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700+ Chemistry Questions In English For All Exams

700+ Chemistry Questions_English

Which of the following is used as a moderator in nuclear reactor?Graphite

Which element that does not occur in nature but can be produced artificially?Plutonium

Which rocks is transformed into marble?Limestone

By which number the quality of gasoline’ sample is determined?By its octane number

What is the principal reason for the formation of metamorphic rocks?Extreme heat and pressure

Which type of glass is used for making glass reinforced plastic?Quartz glass

When temperature is gradually decreased, what is the specific heat of substance?Decreased

Which metal is non toxic in nature?Gold

Which is the element that has the highest first ionization potential?Nitrogen

Which transition metal is in liquid state?Mercury

Temporary hardness of water is due to the presence of which thing?Magnesium bicarbonate

Which air pollutant affect the nervous system of man?Lead

Which oxyacid of halogen has maximum acidic nature?HClO4

What is the characteristic odour of garlic?A sulphur compound

What can be the maximum duration of totality for a solar eclipse?7 minutes 40 seconds

Which of the following is good nuclear fuel?Plutonium-239

Which is the essential element in all organic compounds?Carbon

Salts of which element pro vide colours to fireworks?Strontiur and barium

Leukaemia or blood cancer is characterised by abnormal increase of which cells?White blood cells

What does Oxidation involve?Loss of electrons

In colourful diamond, Why are different colours present?Due to impurities

What is the number of unpaired electrons in carbon atom?2

When some detergent is added to water, what will be the surface tension?Increases

What is reduction of oxide with carbon at high temperature called?Smelting

Conversion of chemical energy into electrical energy occurs in which thing?Battery

Purification of petroleum is carried out by which method?Fractional distillation

Which petroleum refinery product has the lowest boiling point?Gasoline

Which is purest form of iron?Wrought iron

Which is used as a coolant in nuclear reactors?Liquid sodium

What does M3 include?M1 + T.D

Which part of cinchona plant yields quinine?Bark

Liquefied Petroleum Gas consists of mainly which gases?Methane, butane and propane

Which is the secondary source of light in a fluorescent lamp?Mercury vapour

Which elements is obtained from sea weeds?Iodine

Which Bacteria convert atmospheric nitrogen into nitrogenous compound?Nitrogen fixing bacteria

In fireworks, how is the green flame produced?Because of barium

Water will be absorbed by root hairs, then how is when the external medium?Hypotonic

Who does a liquid drop tend to assume a spherical shape?Surface tension

Which substance does not have a melting point?Glass

Which was the first metal used by man?Copper

In which city of India, the diurnal range of temperature is maximum?New Delhi

What is the Number of water molecules present in Mohr’s salt?8

Why are Metals good conductor of heat than insulator?They contain free electrons

A mixture of camphor and benzoic acid can be easily separated by which method?Chemical method

If a material, placed in a magnetic field is thrown out of it, then how is the material?Diamagnetic

In organic compound, halogens are estimated by which method?Carius method

To which are Phototrophic and Geotropic movements linked?Auxin

A place having an average annual temperature of 27°C and an annual rainfall of over 200 cm.where is this?Singapore

Which is the most unreactive gas?Hydrogen

Which is the major oil producing area in U.S.A.?Texas-Louisiana belt

Which country leads the world in the export of oil?Saudi Arabia

With the rise of temperature, what happens in the speed of sound in a gas?Increases

The isotopes of chlorine with mass number 35 and 37 exist in which ratio?3:01

When the radius of the T.G. coil is decreased, what does happen in its sensitiveness?Increases

The United Nations declared 2014 as which International Year?Crystallography

Which colloids are solvent loving colloids?Lyophilic

The resistance of material increases with temperature. What is this?Metal

Which relates to the formation of the Himalayas?Folding of the geosyncline

Which material is very hard and very ductile?Nichrome

Which was the scientist who was responsible for the rejection of vital force theory?Lavoisier

Which award is associated with Agriculture?Bourlog Award

Which rays will deflect in electric field?Cathode rays

Most of hydrocarbons from petroleum are obtained by which method?Fractional distillation

The mass-energy relation is the outcome of which theory?Special theory of relativity

If the atmosphere is cooled, what is its capacity for water vapour?Lowered

Which alloy used in making heating elements for electric heating devices?Nichrome

Which purified oil does Aviation fuel for jet aeroplanes consist?Kerosene

Which metal is used for generation of Nuclear Power?Uranium

Anantapur district in Andhra Pradesh is famous for which metal?Gold

Silver is obtained from the lead & Zinc ares of Zawar mines in which city?Udaipur

Which is the best conductor of electricity?Silve

Through which material does sound travel slowest?Wood

Most of the plants obtain nitrogen from the soil in which from?Nitrates

Which polymer is used for making bulletproof material?Polyethylene

By which the maximum amount of energy in the present day world is provided?Coal

The first law of thermodynamics is concerned with the conservation of which thing?Energy

Which country is rich in oil?Indonesia

Which are macro-nutrients provided by inorganic fertilizers?Nitrogen, phosphorus and potassium

What is the average salt content in a litre of sea water?35 gm

In which Tyndall effect is not observed?Sugar solution

Which is Nuclease enzyme begin its attack from free end of polynucleotide?Exonuclease

Which is electrical circuits used to get smooth de output from a rectified circuit called?Filter

Which soil is best suited for cotton?Regur

Why is the yellow colour of urine?Due to the presence of urochrome

Which stare is the largest producer of coffee?Karnataka

Which enzyme changes maltose into glucose?Maltose

Which planet has the longest day and the shortest year?Mercury

Which polymer is widely used for making bullet proof material?Polyethylene

Which three important micronutrients are essential for humans?Copper, zinc and iodine

What is the name given to an almost circular coral reef inside which there is a lagoon?Atoll

Chocolates can be bad for health because of a high content of which element?Nickel

Galvanised iron sheets have a coating of which metal?Zinc

Chlorophyll is a naturally occuring chelate compound, what is the central metal in this?Magnesium

Chemical name of Washing soda is?Sodium carbonate

What will you put into pure water in order to pass electric current through it?Common Salt

Which fuel causes minimum environmental pollution?Hydrogen

Which hydrocarbon is mainly present in gobar gas?Methane

The cause of fractional atomic weights of elements?The presence of Isotopes

Which gas has maximum calorific value?Oil gas

Phosgene is obtained by the reaction of carbon monoxide and which gas?Chlorine

Which petroleum refinery product has the lowest boiling point?Gasoline

Which sets indicated the Aeolian process?Corrosion, attrition, deflation

Which compound does not contains an OH group?Aldehyde

Maximum hydrogen bonding would be observed in which compound?Methanol

What are the metallic constituents of hard water?Calcium, magnesium and iron

What is the maximum number of hydrogen bonds in a H2O molecule?4

The nitrogen percentage is the highest in which fertilizer?Urea

Which are the high-temperature superconductors?Ceramic oxides

Which Pollutant is produced from vehicles that cause mental diseases?Pb (lead)

What makes a lemon sour?Citric acid

In which type of coal percentage of carbon is the highest?Anthracite

What is formed when white phosphorus is heated at 540 K in the absence of air?Red phosphorus

Which acid is used to remove ink and rust stains and cloth?Oxalic acid

Which metal is present in photo films?Silver

Which is the highest grade of coal whose surface is shining and has the highest calorific value?Anthracite

Which is an element which never exhibits positive oxidation state in any of its compounds?Fluorine

Blue litmus paper is converted into red in solution of which thing?acid

Which is another name of RDX?Cycionite

What is the negative logarithmic value of hydrogen on called?pH

A bee-sting leaves an acid which causes pain and irritation. which is that injected acid?Methanoic acid

In an atomic nucleus, by which force are neutrons and protons held together?Exchange forces

By which a mixture of naphthalene and benzoic acid can be separated?Chromatography

By which Carbon and hydrogen are estimated in organic compounds?Liebig’s method

Which isotope of uranium capable of sustaining chain reactions?U-235

Which is natural source of gamma-rays?Radon gas

Which is the substance which can act both as an acid and a base?Amphoteric

Where is the Smog is likely to occur?Near the industrial areas

Which property of the elements is a whole number?Atomic number

What are the atoms of the elements which have same number of neutrons called?Isotones

What happens to the level of mercury in the barometer tube when it is taken down a coal mine?It rises

Which metal is extracted by electrolytic reaction method?Al (Aluminium)

Which is the basis of modern periodic table?Atomic number

By which can the location and energy of an electron in an atom be specified?Quantum numbers

Which is also called Stranger Gas?Xenon

Mixture of which pair of gases is the cause of occurrence of most of the explosions in mines?Methane and air

Rainwater collected after 30 to 40 minutes of raining is not suitable for drinking why?Because it is acidic

What is the poison of honey bee?Acidic

Which inorganic precipitate acts as semipermeable membrane?Copper ferrocyonide

In which biological process sugar is oxidised to release energy?Respiration

To prepare a standard solution of a substance, what is generally used?Measuring flask

How does Transfer of heat energy from the sun to the moon take place?By radiation only

Which is an active component of oil of clove?Eugenol

In methane molecule how are the four hydrogen atoms arranged?As tetrahedral

What are Rubies and Sapphires chemically known as?Aluminium oxide

Which pair of metals constitutes the lightest metal and the heaviest metal, respectively?Lithium and osmium

Energy transferred to a person through gamma rays is measured in by which unit?Roentgens

Which element has the lowest electron affinity?Argon

What does the emission of ß-particle?Increases the atomic number by one

A fruity smell is obtained by the reaction of ethanol with which compound?CH3COOH

Which gas do not considered as polluting agent of air?CO2

Which compound caused tragedy of Bhopal in 1984?Methyl isocynate

Which compound is used as an antichlor?Na2S2O3

Which chemical used as a ‘fixer’ in photography?Sodium thiosulphate

Which metal has the highest density?Platinum

In human body, into which does the pancreas secretes its enzymes?Duodenum

Which compound is used in anti-malarial drug?Chloroquin

What does Soda water contain?Carbon dioxide

Which processe of weathering belongs to both mechanical and chemical weathering?Crystallization

What is the main constituent of vinegar?Acetic acid

Which compound is used for writing on glass?Hydrogen fluoride

Which compound is commonly used as antifreeze in automobile radiators?Glycerol

When water vapours are passed over aluminium carbide, what do we get?Methane

What are soaps?Sodium or potassium salts of heavier fatty acids

Which material is suitable for water purification?Zeolites

Which chemical is used in foam fire extinguishers?Aluminium sulphate

Which element is with the highest electrical conductivity?Silver

During electrolysis, which the species are discharged at cathode?Cations

Non-stick cooking utensils are coated with which metal?Teflon

Which represents a process of chemical weathering?Hydration and Hydrolysis

How can Permanent hardness of water be removed?By adding washing soda

Which nuclear particles responsible for holding all nucleons together?Mesons

What is generally present in tonics?Ethanol

Which component of the atmosphere has increased during the last 200 years?Carbon dioxide

What does mixture of CS2 and H2S on passing over heated copper give?Methane

Of which metal were the tools and weapons of Harappan civilisation?Copper, tin and bronze

Which is associated with the formation of brown air in traffic congested cities?Nitrogen oxide

Balloons are filled with which gas?Helium

Which are the The best and the poorest conductors of heat respectively?Silver (Ag), and lead (Pb)

Which metal is not attacked by the environment?Gold

Which colloidal solution is used in photography?Colloidal silver bromite

A temperature difference of 25°C is equivalent to a temperature difference of howmany F?45° F

A deuterium nucleus consists of which particles?One proton and one neutron

How many moles are there in 140 g of Si (atomic mass of silicon is 28)?5

Which is used in storage batteries?Lead

An element X forms an oxide X03.6

Which polymeric material is used for making bullet proof jacket?KEVLAR

Which is the main ingredient in cement?Lime stone

Which elementis produced when concentrated cinnabar is roasted in the excess of air?Hg

Which nuclides having the same number of neutrons but different number of protons or mass number?Isotones

Which compound is known as white vitriol?ZnSO4 .7H2O

Which environment leads to the occurrence of acid rain?Sulphur dioxide

Which type of the fruit formed without fertilisation?Parthenocarpy

In vulcanisation, with which the natural rubber is heated?Sulphur

Which algae is used as biofertilizer in the production of crop paddy?Blue green algae

When lake starts freezing the formation of the ice will start first at which point?Top

Which unicellular algae are used as source of oxygen in space research?Chlorella

Which is used as a filler in rubber tyres?Carbon black

Alcoholic fermentation is brought about the action of which thing?Yeast

By whom was the principle of ‘Black hole’ enunciated?S. Chandrashekhar

Which gas has maximum colorific value?Oil gas

A molecule of glucose on complete oxidation yields howmany ATP molecules in case of aerobic respiration?36

A lighted candle gets extinguished when covered with a tumbler. Why?Because of inadequate supply of air

In anaerobic respiration, what is the net gain of ATP per glucose molecule oxidised?2

The elements of group VA are generally known as which name?Pnicogens

Which pairs of rays is electromagnetic in nature?x-rays and gamma rays

Which gase changes lime water in milky colour?Carbon dioxide


Mercury thermometers can be used to measure temperature up to how many °C?360°C


What does Gobar gas contains mainly?Methane

Which are the important raw materials required in cement industry?Limestone and clay

What is not the cause of low conductivity of electrolyte?Ionisation of salt

Cooking gas is a mixture of which gases?Butane and propane

Which acid is produced when milk gets sour?Lactic acid

Which are the most commonly used chemicals in the artificial rain making or cloud seeding?Silver Iodide (Agl)

What happens, When water is heated from 0°C to 10°C the volume of water?First decreases then increases

Which compound does not give a positive test in Lassaigne’s test for nitrogen?Hydrazinc

Litmus paper used in laboratary from which obtained?Lichen

Which acid is used in synthetic lemonade?Citric acid

With rise of boiling point of a water, what will be the latent heat of steam?Decreases

If we sprinkle common salt on an earthworm, why does it die?Due to osmotic shock

What do the contact of two air masses differing sharply in humidity originate?Temperate cyclones

Which of the toxic heavy metals is found in modern tannery industries?Chromium

Why is tetracycline is used?As anti-plague drug

Which contain high content of lead?High octane fuel

Where is Pakistan’s nuclear power plant located?Kahuta

Denatured spirit is a mixture of ethyl alcohol, methyl alcohol and which other thing?Pyridine

During rainy seasons why do doors made up of wood swell up?Due to imbibition

Of the floating iceberg in the sea, how much is the portion remaining above the sea level?1/10th

By which enzyme is Urea converted into ammonia and carbon dioxide?Urease

Which colour of heat radiation represents the highest temperature?White

Which fertilizer has more nitrogen content?Urea

Trees in tropical deciduous forest shed their leaves in which season?Dry season

Food wrapped in newspaper is likely to get contaminated with which desease?Lead

If a U-238 nucleus splits into two identical parts, how will the two nuclei be so produced?Stable

Which metal is used for making boats because it does not corrode by seawater?Titanium

Which is a strong smelling agent added to LPG cylinder to help in the detection of gas leakage?Thioethanol

Which is a metamorphic rock?Slate

What is the best conductor of electricity?Salt water

Which was the The first atomic power reactor in India?Apsara

Which of the element of group 17 is radioactive?Astatine

Which has the least penetrating power?Alpha particles

Which land mark in medical history was the first to take place?Plastic surgery

Most of the explosions in mines occur due to the mixing of things?Oxygen with acetylene

Which metal causes Itai-itai disease?Cadmium

Glass is made of the mixture of which things?Sand and silicates

Which is the chief characteristic of wet and dry tropics?Constant heating

What is a graph is plotted taking °C along the Y-axis and of K along the X- axis?Straight line

Acetyl salicylic acid is commonly used as which medicine?A pain killer

The electron emitted in beta radiation originates from where?Inner orbits of atoms

Which chemically inactive gas present in the atmosphere?Argon

By whom was the absolute value of charge on electron determined?R.A. Millikan

From which the cathode ray particles originate in a discharge tube?Cathode

Which element has two electrons in the K-shell only?Helium

Major part of CO2 is transported to respiratory surface in form of which ion?HCO3 ion

Which type of isomerism is shown by diethyl ether and methyl propyl ether?Metamerism

Which allotrope of the carbon is used in cutting and drilling?Diamond

In certain amino acids, which elements is found in addition to carbon, hydrogen, nitrogen and oxygen?Sulphur

Which substance coated on plastic tape?Iron oxide

Which is the cloud that is dark-grey or black, found at very low height and brings the real rain?Nimbostratus

X210 has half life of 5 day. What is the time taken for seven-eights of sample of X210 to decay?15 days

A gas is found to have the formula (CO)n. Its vapour density is 70. What must the value of n be?5

What are Alpha rays emitted from a radioactive substance?Helium nuclear

Which is used in beauty parlours for’ hair setting?Sulphur

Which gas is most predominant in the Sun?Hydrogen

Which is the lightest gas?Hydrogen

When Metal carbonate reacts with dilute acids, what does it forms?CO2

The element common to all the acids is known as which name?Hydrogen

Which is the gas usually filled in the electric bulb?Nitrogen

To whom the credit for the discovery of transuranic element goes?Seaborg

Sodium carbonate crystals lose water molecules. What is this property called?Efflorescence

Which gase is essential for photosynthesis process?CO2

Acetylene is used as an anaesthetic under which name?Narcylene

Which is responsible for red rot of sugarcane?C o l l e c t o r i c h u m falcatum

What is the major ingredient of leather?Collagen

Which particle has similar mass to that of the electron?Positron

Which acid used to remove inkspots?Oxalic acid

For pasteurisation of milk by Flash method, at which temperature is milk heated?100°C

Which chemical is used for preserving fruit juices?Sodium benzoate

Which metal is found in ‘plaster of paris’?Calcium

In which year did Mahatma Gandhi return to India, leaving South Africa for ever?1914

Which radiation emitted from the sun has highest wavelength?Micro waves

Aluminium surface are often ‘anodized’. This means deposition of a layer of which oxide?Zinc oxide

Which Scale is used for recording weather condition?Barometer

Which chemically inactive gas present in atmosphere?Argon

Which synthetic fibre is known as artificial silk?Rayon

All acids contain which element?Hydrogen

Which predominantly acts as the agent of chemical erosion of soil?Underground water

Formation of pot holes in river beds is an example of thing?Corrosion

Which type of glass can cut off ultraviolet rays?Crooked glass

Which is called philosopher’s wool?Zinc oxide

When ore is heated generally in absence of air then what is process called?Calcination

Which pair does not contain a coinage metal?Zinc and Gold

What is the most soluble in water?Sugar

From where can renewable energy be obtained?Biomass

When ice melts into water, which type of change occurs in entropy?Increases

The pH of water at 25°C is 7.Remains same

Which is produced during allergic reactions?Histamine

What is the mixture of carbon monoxide and hydrogen called?Water gas

In the leaf of tobacco what is found?Nicotin

In which Molecule the distance between two adjacent carbon atoms is longest?Ethane

Which charcoal is used to deeolourise raw sugar?Wood charcoal

Which metal used to pollute the air of a big city?Lead

Which form an irreversible complex With haemoglobin of blood?Carbon monoxide

Regarding the atom of a chemical element, magnetic quantum number refers?Orientation

When an ebonite rod is rubbed with fur, which charge acquired by the fur?Positive

What is development of fruit without fertilization called?Parthenocarpy

Which charcoal forms of carbon is used in sugar industry?Animal charcoal

One molecule of hemoglobin can carry how many atom of oxygen?8

Which is a source of methane emission into the atmosphere?Wetland

Which is not an important condition for growth of coral?Wave-free salt water

Which is the element common to all acids?Hydrogen

What is the function of Leghaemoglobin in nitrogen fixation?Absorption of oxygen

Which is the most important ore of aluminium?Bauxite

Which chemical can be used is anticoagulent?Sodium citrate

Carbon monoxide has how much greater affinity for haemoglobin as compared to oxygen?200 times

In which country does State funding of elections take place?Germany and Austria

Starch iodide paper is used to test for the presence of which agent?Oxidising agent

The powers of the Election Commission are given in which Article of the Constitution?324

Which Element present in largest amount in human body?Oxygen

What is formed by dissolution of base or acid in water?Exothermic

Which processe is used to remove reducible oxides from the metal?Poling

Mercury is transported in metal containers made of which metal?Iron

What does lattitude place indicate?Temperature

By whom was Cholera bacillus discovered?Robert Koch

Stainless steel is an alloy of which metals?Iron, chromium and nickel

What is the oxidation number and covalency-of sulphur in S8?0, 2

What is the substance which decreases the rate of a chemical reaction?Poison

Dwarfness can be controlled by treating the plant with which acid?Gibberellic acid

Which are the Chemicals having profound effect on growth and development?Phyto hormones

Which is obtained, when H2S is passed through the solution of sodium zincate?ZnS

Fish die in water bodies polluted by sewage, why?Due to Reduction in oxygen

What is produced during the formation of photochemical smog?Nitrogen oxide

Which place has no Ashokan edicts?Pataliputra

Parthenocarpy fruit is obtained by which sprying phytohormone?Auxins

Which is a non-metal that remains liquid at room- temperature?Bromine

By which rular was the new element of ‘Gopuram’ encouraged in temples of South India?Cholas

Which colloidal solution is commonly used as germ killer?Colloidal sulphur

Which is an insectivorous plant?Pitcher plant

What number of essential amino acid is found in man?20

By which is the amount of light entering into the eye controlled?Iris

Which is the compound in that oxygen shows + 2 oxidation state?F2O

The heavier silicates named ‘Sima’ or silica + magnesium are most abundant in which layer?Crust

With which period do we associate the ‘microlith’ implements?Mesolithic

Insectivorous plant generally grow in soil which is deficient in which gas?Nitrogen

Which compound can not be used as nitrogenous fertilizer?HNO3

Which is a non-ferrous metal?Aluminium

DC current can be controlled by which component?Resistance

Sodium metal is kept under which liquid?Kerosene

Which naturally occurring element in the rice husk makes it termite resistant?Silicon

What is a powerful eye irritant present in smog?Sulphur dioxide

How is the relative permeability of a diamagnetic material?Less than unity

Which desert is famous for its deposits of nitrates?Atacama

What is Isomerism exhibeted by acetic acid and methyl formate?Functional group

Which is considered as a cell withing a cell?Golgi appartus

Which is a significant contributor to increased levels of atmospheric carbon dioxide?Deforestation

Who is responsible for the registration of voters?Election Commission

Which is used in welding industry?Acetylene


Where was the world’s first oil-well drilled in the nineteenth century?Titusfills in Pennsylvania, U.S.A.


Which was a novelty in Shah Jahan’s buildings?Makrana marble

Flux reacts with the impurities to form fusible material. which is known as which name?Slag

If the dew point is below freezing, it is referred to which point?Frost point

Which is printed on a commonly used fluorescent tube light?6500 k

In which organ carbohydrate is stored as glycogen?Liver

Which element does not show variable oxidation states?Zinc

Which type of coal represents the first stage of formation of coal?Peat

What is formula of plaster of paris?2CaSO4.H2O

What is the main constituent of natural gas?Methane

‘IC chips’ for computers are usually made of which metal?Silicon

What does Hydrogen fuel cell vehicles produce as “exhaust”?H2O

What is an example of Miscelles System here?Soap + Water

What is saliva in man?Alkaline

What is the main constituent of haemoglobin?Iron

Which was the first synthetic fibre made by man?Nylon

In the structure of planet Earth, below the mantle, the core is mainly made up of which?Iron

What is the best conductor of electricity a 0.1 M solution?Sulphuric acid

What is the chemical formula for water glass?Na2SiO3

Which of the following is used as a lubricant?Graphite

What is the function of heavy water in a nuclear reactor?Slow down the speed of neutrons

Uranium eventually decays into a stable isotope of element?Lead

Which is the metal used in storaoe batteries?Lead

Which type of soils have a marked capacity to retain water?Regur soil

What is laughing gas?Nitrous oxide

When sodium bicarbonate is heated, what is the product obtained?Na2CO3

If a liquid wets a solid surface, what is the angle of contact?Less than 90°

Which noble gas was discovered in chromosphere of the sun?Helium

What does Talc contains?Magnesium, silicon and oxygen

Which mixture is homogeneous?Methanol and water

Which form of phosphorus is used in safety matches?Red phosphorus

Which gas is used for refrigeration?Ammonia

By which an element is best characterized?By its atomic number

Which is the softest?Sodium

What is used in preparing match sticks?Red phosphorus

Which are the Actinides elements with atomic numbers?From 89 to 103

What is the most suitable unit for expressing nuclear radius?Fermi

What is the transfer of energy through matter from particle to particle?Conduction

Chlorine acts as a bleaching agent only in the presence of which thing?Moisture

Which pair of metals are supposed to constitute the internal core of the earth?Nickel and Iron

What does Nail polish remover contain?Acetone

Select the compound in which chlorine shows oxidation state + 7?HClO4

Which substance is used to retard the setting action of cement?CaSO.2HO

What is the composition of Nitrolim-a chemical fertilizer?Calcium carbide and nitrogen

What are species containing same number of electrons called?Isoelectronic

Rusting of iron is an example of which thing?Slow oxidation

What is the natural source of hydrocarbon?Biomass

Which is used as a fuel in Nuclear power stations in India?Thorium

Which gas is absorbed during photosynthesis?CO2

What is a mixture of potassium nitrate, powdered charcoal and sulphur called?Gun powder

Which is a major constituent of Biogas?Methane

Which ore contains both calcium and magnesium?Dolomite

Who proposed the Atomic principle of matter?Dalton

Which two basic forces are able to provide on attractive force between the two neutrons?Gravitational and Nuclear

When a bond is formed between two atoms, the energy so system will be–Decrease

Element having atomic number 29 is related to –D-Block

Which of the following particle being charged negatively?Electron

Cathode rays are–Stream of electrons

Which of the following element is most electronegative?Fluorine

Which of the following determines the chemical properties of an element?Number of electrons

The product equivalent weight and valiancy of an element is equal to–Atomic weight

Orientation of atomic orbital is controlled by –Magnetic Quantum number

Who is awarded by noble prize for the discovery is neutron?Chadwick

An Element Atomic number 17 and mass number 36, then number of neutrons present in it–19

Which of the following has maximum Mass?Neutron

Atoms having equal number of protons but different number of Neutrons are called –Isotopes

Atoms having same no of neutron but different no of electrons or protons are called –Isotones

Nucleotide have same atomic number are called:Isotopes

What is the value of Avogadro number?6.023 × 1023

Which of the following is not a nucleon?Positron

Chemical behavious of an element depends upon its–Number of electrons revolving around nucleus

Atomic nuclei are composed of–Protons and neutrons

The fundamental particles that composed on atom are–Proton, electron, Neutron

What are the fundamental elements of an atom?Electron, Proton, Neutron

Electronic configuration of Element Atomic number 20 is –2, 8, 8, 2

Who discovered the element Atomic number 106?Seaborg

Mark the compound which posses ionic, covalent and co–ordinate bond:NH4Cl

Property of Ammonia is –In its aqueous solution Red Litmus turns to Blue Litmus

Paper of old books turns to brownish color due to –Oxidation of cellulose

Which of the following is strongest oxidizing agent?Fluorine

Positive oxidation state of oxygen is possible only in–OF2

What is the oxidation number of Nickel in K4[Ni(CN)4]?Zero

If Mg Cl2 contains one Millions of Mg2+ Ions, then how many Chloride Ions are present in it?Two million

When Helium atom Loses electron, then it becomes–Positive Helium ion

The mass number of a nucleus is –sometimes more and sometimes equal to its atomic number

The weight of 6.023 × 1022 atoms of carbon is –1-2gram

Which of the following particle has the dual nature of particle wave?Electron

Mass number is the sum of –Protons and Neutrons

An alloy used in making heating elements for electric heating devices is –Nichrome

The use of Heat treatment of ore that includes smelting and roasting is termed as–Pyrometallurgy

Which of the following does not contains silver?German Silver

Aluminum is extracted from –Bauxite

The ore of Aluminum is –Bauxite

Brass contains –Copper and Zinc

Brass is made ofCopper and Zinc

Maximum permissible concentration of copper in drinking water in mg/L is –2

Brass gets discoloured in air due to the presence of which gas in air?Hydrogen sulphide (H2S)

Which type of Glass is used for making glass reinforced plastic?Fiber glass

Purification of copper is done by –E l e c t r o l y t i c decomposition

Non-Metal found in Liquid state is –Bromine

The phenomenon of ejection of electrons from the metal surface when a light of suitable frequency falls on it is called–Photoelectric effect

Acute Lead poisoning is also known as –Plumbism

Which of the following metal has least melting point?Mercury

Which of the following metal forms amalgam with other metals?Mercury

Amalgam is an alloy in which the base metal is–Mercury

What is Baeyer’s reagent?Alkaline Potassium Permanganate

Hygroscopic substances are those substance which ready absorb–Water Vapors

Rusting of Iron is –Due to oxidation

The rusting of iron metal in air needs both–Oxygen and Moisture

Which of the following is required for the rusting of iron?oxygen and water

Iron rusts quickly in –Sea water

The rusting of iron–Increases its weight

Which of the following is not a chemical change?Conversion of water into steam

If the bullets could not be removed from gunshot injury of a man, it may cause poisoning by–Lead

The ratio of pure gold in 18 carat gold is –0.75

The King of metal is –Gold

German Silver contains following Metals –Copper, Zinc, Nickel

Which of the following is not contained by the German Silver?Silver

Which metal is used to Galvanize iron?Zinc

To protect the iron from getting rusted, the coat of zinc is applied on it. This process is known as–Galvanization

Ultra purification of a Metal is done by–Zone Melting

Glass is a –Supper cooled Liquid

Which of the following contains high content of Lead?High octane fuel

Which of the following is not favourable to prevent iron from rusting?Annealing

Which of the following is responsible for extra strength of Pyrex glass?Borax

Which one of the following metals does not react with water to produce hydrogen?Cadmium

Which one of the following reacts with Fehling’s solution?HCHO

Sodium vapor Lamps glow with yellow Light. This is due to–Sublimation of sodium to emit yellow colour

The Element which does not occours in nature but can be formed, isRadium

Which of the following elements behave chemically both as metal and a non- metal?Boron

Which of the following metal has maximum electrical conductivity?Silver

Which of the following is most bad conductor?Lead

Bronze is an alloy of–Copper and Tin

Shock absorbers are usually mode of steel as it?Has Higher elasticity

Identify the metal which is non-toxic in nature–Gold

Which of the following metal is found in Free State in natureGold

Most important ore of Lead is–Galena

Which of the purest commercial form of Iron?Wrought Iron

Which of the following is purest form of Iron?Wrought Iron

Which one of the following is known as the brown coal?Lignite

Which one of the following is not a coal variety?Dolomite

The Iron ORE which contains 72% of Iron is –Magnetite

Which one of the following is an iron ore?Magnetite

Which one of the following Mineral does not contains oxygen?Cryolite

Which metal is protected by the layer of its own oxide?Aluminum

The ore only two metals that are Non–Silver in colour, they are–Copper and gold

Siderite is an ore of–Iron

Which of the following process is used in the extraction of iron from the Iron ore?Reduction

Which one of the following metals cannot be used as an electromagnet?Copper

Quartz is a type ofSilicon dioxide

Raw materials used in the manufacturing of glass are–Soda, Lime Stone Silica Sand ash

Ruby and sapphire are the oxides of – Aluminum

Which of the following is used in welding broken pieces of iron rails and parts of machine –Aluminum Powder

Which one of the following does not present in the Stainless Steel?Tungsten

The addition of Gypsum to Portland cement helps in–Preventing rapid settling of cement

Who discovered cement?Joseph Aspdin

Air pollution by “Fly Ash” is caused by–Cement industry

Cement is formed by strongly heating a Mixture of –Lime Stone and clay

Cement is a mixture of –Calcium Silicate and calcium aluminates

Which one of the following Metals is used to Heat up the electric iron?Nichrome

Which of the following is strongest coagulant?Aluminum Chloride (Alcl3)

The Base used as an antacid is –Magnesium Hydroxide Mg(OH)2

Which of the following metal is found in Free State?Copper

Which one of the following is used in Pencils?Graphite

In Graphite layers are held together by–Vander wall forces

Which one among the following is Lubricant?Graphite

One carat of Diamond is equal to–200 mg

Which of the following are properties is generally found in non-metals?Brittleness

What is wood spirit?Methyl Alcohol

Fire-Fighting cloths are made from–Asbestos

The Gas Causes acid rain in an industrial area is–Sulphur dioxide

Acid rain in the environment is caused by the Higher concentration of –SO2 and NO2

Which one of the following is used to dissolve noble metals?Aqua regia

Aqua regia is a Mixture of the following in the ratio 1:3 by volume–Conc HNO3 and conc CHL

Sulphuric acid is –Dibasic

Fullerene is a newly discovered crystalline carbon allotrope, contains–60 C atoms

Catalytic Converters are Generally Made from –Transition Metals

The First Time atomic bomb was released at–Hiroshima

Hydrogen Bomb is based upon the Principle of–Uncontrolled Nuclear Fusion

Which type of reaction produces the most harmful radiation?Fission

How many countries explode the atom bomb before India?5

Chocolates nay Harmful to Health because they contains High quantity of –Lead

Gun Powder was discovered by–Roger beckon

Gun Powder is a Mixture of–Nitrate, Sulphur and Charcoal

Which of the following mixture cause the explosion of TNT (Trinitrotoluene)Ammonium Nitrate

Which of the following Isotope is used in the production of Nuclear Energy?U-235

High amount of energy is released in the explosion of atomic bomb is due to–Conversion of Mass into energy

Tritium is an Isotope of –Hydrogen

In India Nuclear Weapon was tested at –Pokhran

Nuclear Power Reactor act on the Principle of–Fission

The two elements which are used to absorb the neutrons in nuclear fission during chain reactionBoran and Cadmium

Fuel used in Nuclear reactor is –Uranium

Graphite is used as a… in nuclear reactors.Moderator

Heavy water used as a coolant in nuclear reactor. Heavy Water is:Water containing heavy Isotopes of Hydrogen atom

In nuclear reactor, Neutrons are slowdown by theModerator

Who discovered the natural radioactivity?Henri Becquerel

Radioactive decay of uranium resulted the formation of final product–Lead

Uranium eventually decays into a stable isotope of –Lead

In the treatment of skin disease the radio isotope used is–Radio Phosphorous

Radioactivity is Measured by –Giger – Muller counter

The most suitable unit to express the nuclear radius is –Fermi

Radioactive Noble Gas is–Rn

There is no change in radioactive element (Mass or change) during –Gamma emission

Radioactivity is the fission of –Nucleus

Quality of Petrol expressed in terms ofOctane number

In LPG cylinder under the High Pressure mainly mixture of Gases filled in Liquid form –Propane and Butane

Kitchen or Cooking Gas is a mixture of –Butane and Propane

PNG (Piped Natural Gas) is used for –Cooking

TEL (Tetra Ethyl Lead) is a –An anti knock Compound

Wax used for making candles is chemically a mixture of–Aliphatic Hydrocarbons

Petroleum is a Mixture of –Hydrocarbons

Glycol is added to aviation gasoline because itPrevents freezing of petrol

Water is not effective in extinguishing a fire caused by petrol because–Water and petrol are immiscible with each other and petrol which forms upper Layer continuous to burn.

Diesel oil is prefer for Heavy Motor Vehicles because it–It has more capacity and fuel save

The temperature of oxy–acetylene flame is around–32000C

Rayon is formed by –Cellulose

Polyethene is formed by –Ethylene

Glycogen, Cellulose and starch are the polymers of–Glucose

The process of Heating of Rubber with sulphur to increase it quality is known as –Vulcanization

Natural rubber is a polymer of–Isoprene

Afriline is a –Fiber

PVC is obtained by the polymerization of –Vinyl chloride

The gas that usually cause explosion in coal mines is–Methane (CH4)

Bakelite and Phenol are the polymers of–Formaldehyde

Silicon is a Polymer ofDialkyal dichloro silane

Which gas used as an anesthetic?Nitrous oxide

The drug which Lowers anxiety and provide Peace –Tranquilizer

The branch of medicine involving synthetic chemical compounds is–Allopathic

The pair of compounds used as anesthetic in medicine is –Nitrogen dioxide, chloroform

Fluid used commonly in making Bio-gas –Animal Wast

Gobargas mainly containsMethane

Main Constituent of air is–Nitrogen

Zinc Phosphide is commonly used as –Rodenticide

Oxides of sulphure present in atmosphere washed down by rain to cause–Lowering of PH of soil

Green House effect meansTrapping of solar energy due to carbon dioxide.

Depletion of ozone Layer is mainly due to –Chlorofluoro carbons

Which atmospheric gas absorbs ultraviolet rays?Ozone

Pasteurization is a process in which milk is Heated at–630C for 30 min

Combustion is a –Chemical Process

Chief pollution of smoke of cigarette is–Carbon monoxide and nicotine

Smoke of tobacco is Injurious to Health because it contains –Nicotine

Producer gas is Highly Poisonous due to the presence of –Carbon Monoxide

It is not advisable to sleep under the tree at night because trees release–Carbon dioxide

The calorie requirement of the body increases in winter as compared to summer because ore calories are necessary toSustain body temperature

Micro organism which monitor the air pollutionLichen

Substance used Highly as a food preservative –Sodium salts of benzoic acids

Super Sonic Jet causes pollution by thinning of–O3 Layer

Bhopal Gas Tragedy was caused by –Methyl Isocyanite

Freon is used as aCoolant

Coolant ‘Freon’ is–Dichloro Methane

Which gas is used for the artificial riping of Green Fruits?Ethylene

Aspirin is common name of–Acetylsalicylic acid

Chemical name of Gamma xene isBenzene Hexa Chloride

Main Gaseous pollutant of thermal power plants is–SO2

Acid rain destroy vegetation because it contains –Sulphuric acid

A hard fluid present in smog which causes irritation in eyes is–Peraxyacetyl Nitrate

Acid rain is caused due to pollution of atmosphere by–Oxides of Nitrogen and Sulphur

The inert gas used as beacon Light is –Neon

Hydrogen was discovered by –Cavendish

Paper is made by–Cellulose of plants

Litmus is obtained from –Lichen

Which gas is used as a disinfectant in drinking water?Chlorine

Black Lung disease occours in people working in –Coal mines

Burning of candle is aExothermic reaction

In the Industrial production of vegetable ghee, the process involved is –Reduction

Gas used in the production of vegetable ghee is–Hydrogen

Cooking oil is converted into vegetable ghee by the process of–Hydrogenation


In a reaction of type A + B → C + D one could ensure it, to be a First order reaction by–Increasing the concentration of a Product

Bagasse is used in the manufacturing of–Paper

Size of suspended particles lies between–10–5 – 10–7 cm

An Emulsion is a colloid of a –Liquid in a Liquid

Milk is aEmulsion

A colloidal system in which a Liquid is dispersed in a Liquid is called –Emulsion

A gas thermometer is more sensitive than a Liquid thermometer because a gasExpands more than a Liquid

Nitrogen has Higher ionization energy than oxygen because in Nitrogen there is–Half Filled Stable configuration in 2p orb

In deep see diving, divers use a mixture of gases consisting of oxygen and–Nitrogen (N)

The Gas dissolved in water that makes it basic is?Ammonia

Which metal is extracted from Sea water?Magnesium

The Physical method Commonly used to purify Sea water is–Distillation

Sea water can be purified by the Process of– Distillation

Soda water containsCO2

A Liquid is said to be boiled when its–Vapor pressure is equal to the surrounding pressure

Hygroscopic objects are those which instantly absorb–Water vapors

Quantity (Amount) of water vapors present in atmosphere is measured in –in the form of Humidity]

Spirit in Contact with body gives cool sensation because it isHighly volatile

Cloud is a colloidal of –Water drop in a dispersion medium of air

Light Scattering take place in –Colloidal solution

What is the fourth State of Matter?Plasma

Muddy water is treated with alum in Purification process–Coagulation

Alum is used for the water treatment in the process named–Coagulation

Suspended colloidal particles in water can be removed by the process of –Coagulation

Alum stops bleeding in a minor cut because of–Coagulation

What is the meaning of Reader in waste water treatment process?Container

Iodine can be separated from a mixture of Iodine and potassium chloride bySublimation

Water does not evaporate, if [StenographerHumidity

The amount of chlorine available in water after disinfection called asResidual chlorine

What will be the form of Nitrogen in sewage water is completely oxidized?Nitrate

When water itself combines chemically with some element or mineral it is called–Hydration

Heavy water means–Water containing Maximum density

What is the chemical composition of Heavy Water?D2O

Heating of ore in the absence of air below its melting point is calledCalcinations

Water can be separated from the mixture of water-Alcohol by the process–Distillation

Iron and Manganese are removed by the process of–Filtration

What changes will happen to a bowl of ice and water kept at exactly zero degree Celsius?No change will happen

The Process of ozonation in water treatment is known asDisinfection

Charcoal is used in water treatment as a/an–Adsorbent

Detergents used for cleaning cloths and utensils containsSulphonates

Detergent cleans the surface on the principle of –Surface tension

Aqueous Hydrolysis of sucrose formed –Glucose and Fructose

Glucose is a type of –Hexose Sugar

Dry ice is a solid type of –Carbon dioxide

Water gas is a Mixture of–Carbon monoxide and Hydrogen

Enzyme which coagulate the milk into curd–Renin

Process of Removal of calcium and Magnesium is known as –Water softening

Phenolics as Pollutant can be removed from waste water by use of–Ion exchange method

Highly polluting industries comes under the category of–Red

When Hydrogen combusts in air, then formed–Water (H20)

Gas used as a fire extinguisher isCarbon dioxide (CO2)

Chemically Lime water is –Calcium Hydroxide

Which gas is used for converting vegetable oils into saturated fats –H2 (Hydrogen)

Heat transfer Horizontally with in atmosphere is called–Advection

Chemical name of bleaching powder isCalcium Hypochlorite

Lime water becomes milky when exposed to air due to the presence of –Carbon dioxide

Venturimeter is used to measure the–Rate of flow of Liquid

The two specific Heats of gases are related by–CP–CV = R/J

What is the Main Source of Manufacturing of Nitrogenous Fertilizer?Ammonia

What is the average value of salt present in sea water?0.035

Percentage of Lead in Lead Pencils is –0

The material used in the manufacture of Lead pencil is–Graphite

What happens during the charging of Lead operated battery?Consumption of sulphuric acid

Plaster of Paris is made by the Partial dehydration of –Gypsum Salt

Non-metal founds in Liquid State –Bromein

Isomer of ethyl alcohol is –Die Methyl ether

Froth Flotation process is used for the metallurgy of – Sulphide ore

Which silver salt is used for making film of photography?Silver Bromide (Ag Br)

The chemical name of Hypo commonly used in Photography is–sodium Thiosulphate

Conversion of Heat into electric energy is achieved by using –Thermocouple

Hydrochloric acid is also known asMuriatic acid

Disadvantage of using DDT as pesticide is –Not easily degradable in nature

pH-scale ranges from –0–14

The maximum density of water is at–40C

In a rechargeable cell what kind of energy is stored within the cell?Chemical energy

The acid used in the Lead storage cell is –Sulphuric acid

Which acid is stored in batteries?Sulphuric acid

The mercury and sodium street Lamps Light up become of–Atomic emission

What is asbestos?Magnesium silicate

Chemically ‘Philosopher wood’ is a–Zinc oxide (zno)

Chemical Name of common salt is–Sodium chloride

Sodium chloride or Table salt occours in nature as the mineralHalite

Sodium carbonate commonly known as–Washing soda

Chemical formula of washing soda is–Na2Co3 10H2O

Commercial name of sodium bicarbonate is –Baking Soda

Chemical name of baking soda is–Sodium Bicarbonate

Chile saltpeter is the common name of–Sodium Nitrate (NaNo3)

The process of conversion of sugar in to Alcohol is known as–Fermentation

Vinegar is the chemical name of –Acetic acid

Vinegar formed by the fermentation of cane sugar contains–Acetic acid

Electrolysis of copper sulphate solution with copper electrodes gives–Copper at cathode and oxygen at anode

Tip of match stick contains –Red phosphorous

Green colour seen in firework display is due to the chloride salt ofBarium

The acid which fails to Liberate carbon dioxide from Sodium carbonate is –Carbonic acid

Mortar is a mixture of water, sand –Slaked Lime

Most commonly bleaching agent is –Chlorine

Helium gas is filled in the balloon instead of Hydrogen because its–Non-Combustible

Why Helium gas used in balloons?Its Lighter than air

Which gas is filled in balloons?Helium

The main cause of air pollution in big cities isSuspended particle

The word ‘Brown air’ is used for –Photochemical Smoke

Which affected the ‘Taj Mahal’?Which affected the ‘Taj Mahal’?

Hydrogen sulphide is aColourless gas with rotten egg smell

What is Peroxyl?Macro Pollutant

Burning Pyrites ore gives outSulphur dioxide gas

Chloroform can be used as – Anaesthtic

Sour taste of coca cola is due to –Phosphoric acid

Element with Highest Ionization energy is–helium

White Phosphorous is place under theCold water

Commonly sodium is kept under the– Kerosene oil

What happen when a drop of Glycerol is added to KMno4 spread on paper?The paper ignites

By Product obtained by soap industry is –Glycero

The process involved in the making of soap is–Sponification

The antiseptic compound present in Dettol is –Enloroxylenol

Main constituent of Liquid Bleach isSodium Hypochlorite

Caustic Soda is –Deliquescent

Who was the first to explain hydrogen spectrum?Neils Bohr

Dry powder fire extinguisher contains – Sand and sodium bicarbonate

Carbon dioxide is a –dehydrated agent

The most abundant Nobel gas in the atmosphere isArgon

The most abundant element on the earth isOxygen

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