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Chemistry MCQ for JEE Mains with Solutions PDF for Students
Chloroform can be used as:
(a) Antibiotic
(b) Analgesic
(c) Anaesthetic
(d) Antimalarial
Option c – Anaesthetic
The main source of carbon monoxide is:
(a) Transportation
(b) Fuel combustion
(c) Industrial process
(d) Solid waste disposal
Option a – Transportation
Which of the following is caused by the higher concentration of nitrogen and phosphorus?
(a) Acidity
(b) Hardness
(c) Alkalinity
(d) Eutrophication
Option d – Eutrophication
White phosphorus is generally kept under:
(a) Alcohol
(b) Kerosene oil
(c) Water
(d) Glycerine
Option c – Water
Which of the following is used as an anesthetic?
(a) N₂O
(b) NO
(c) NO₂
(d) NH₃
Option b – NO
Dry ice is:
(a) Solid sulfur dioxide
(b) Dry carbon dioxide gas
(c) Solid carbon dioxide
(d) Solid ammonia
Option c – Solid carbon dioxide
Major gaseous pollution of the thermal power station is:
(a) NH₃
(b) CO₂
(c) NO₂
(d) H₂S
Option b – CO₂
Which one of the following is radioactive?
(a) Platinum
(b) Strontium
(c) Thorium
(d) Cesium
Option c – Thorium
Which of the following is used in making smoke bombs?
(a) Carbon
(b) Sulfur
(c) Hydrogen
(d) Phosphorus
Option a – Carbon
Galvanization is the:
(a) Deposition of copper on iron
(b) Deposition of zinc on iron
(c) Deposition of tin on iron
(d) Deposition of aluminum on iron
Option b – Deposition of zinc on iron
Which one of the following is found in kidney stones?
(a) Calcium acetate
(b) Sodium oxalate
(c) Sodium chloride
(d) Calcium oxalate
Option d – Calcium oxalate
In a nuclear reactor, the material used for absorbing neutrons is:
(a) Lead
(b) Zinc
(c) Cadmium
(d) Radium
Option c – Cadmium
Which of the following metals has the least melting point?
(a) Copper
(b) Gold
(c) Silver
(d) Mercury
Option d – Mercury
The inert gas substituted for nitrogen in the air used by deep sea divers for breathing is:
(a) Argon
(b) Helium
(c) Neon
(d) Krypton
Option b – Helium
Which of the following is the best fuel in terms of energy released per gram of fuel?
(a) Butane
(b) Methane
(c) Ethanol
(d) Hydrogen
Option d – Hydrogen
Sodium carbonate is commonly known as:
(a) Caustic soda
(b) Baking soda
(c) Washing soda
(d) Caustic potash
Option c – Washing soda
Which of the following is not a noble gas?
(a) Argon
(b) Helium
(c) Neon
(d) Hydrogen
Option d – Hydrogen
Natural rubber is the polymer of:
(a) Ethylene
(b) Isoprene
(c) Styrene
(d) Butadiene
Option b – Isoprene
Mercury is a:
(a) Liquid metal
(b) Liquid non-metal
(c) Solid metal
(d) Solid non-metal
Option a – Liquid metal
What is the most common salt in sea water?
(a) Sodium chloride
(b) Potassium sulphate
(c) Calcium carbonate
(d) Magnesium sulphate
Option a – Sodium chloride
Which of the following is not an anesthetic agent in surgical operations?
(a) Ether
(b) Nitrous oxide
(c) Acetone
(d) Chloroform
Option c – Acetone
Iron rusts quickly in:
(a) River water
(b) Sea water
(c) Rain water
(d) Distilled water
Option b – Sea water
Philosopher’s wool is:
(a) Zinc oxide
(b) Zinc carbonate
(c) Zinc sulphate
(d) Zinc blended
Option a – Zinc oxide
The chief source of Naphthalene is:
(a) Coal-tar
(b) Charcoal
(c) Camphor
(d) Diesel
Option a – Coal-tar
Heavy metal pollution of water is caused by:
(a) Wood burning
(b) Paints
(c) Acid plants
(d) Domestic sewage
Option b – Paints
The purest form of water is:
(a) Tap water
(b) Ground water
(c) Rain water
(d) Distilled water
Option c – Rain water
Greenhouse effect is caused by:
(a) Carbon monoxide
(b) Nitrogen
(c) Carbon dioxide
(d) Nitrogen dioxide
Option c – Carbon dioxide
Aspirin is the common name of:
(a) Methyl salicylate
(b) Salicylic acid
(c) Acetyl salicylic acid
(d) Salicylate
Option c – Acetyl salicylic acid
The strongest oxidizing agent among the following is:
(a) Oxygen
(b) Iodine
(c) Chlorine
(d) Fluorine
Option d – Fluorine
Which gas emitted by power stations among the following is:
(a) Nitrogen
(b) Sulphur dioxide
(c) Carbon dioxide
(d) Helium
Option b – Sulphur dioxide
Which one of the following minerals is found in Monazite sand?
(a) Sodium
(b) Potassium
(c) Thorium
(d) Uranium
Option c – Thorium
Which of the following substances is highly plastic?
(a) Clay
(b) Mica
(c) Granite
(d) Quartz
Option a – Clay
Which of the following is biodegradable?
(a) Plastic
(b) D.D.T
(c) Paper
(d) Aluminium
Option c – Paper
The sewage obtained from water closets and urinals is known as:
(a) Garbage
(b) Sullage
(c) Sanitary waste
(d) Industrial waste
Option c – Sanitary waste
The percentage of oxygen in air is approximately:
(a) 1%
(b) 21%
(c) 78%
(d) 100%
Option b – 21%
Heating of an ore below its melting point in the absence of air is known as:
(a) Smelting
(b) Calcination
(c) Roasting
(d) Refining
Option b – Calcination
The pH of lemon juice is expected to be:
(a) Less than 7
(b) More than 7
(c) Equal to 7
(d) Nothing can be predicted
Option a – Less than 7
The wire of flash bulbs is made up of:
(a) Mg
(b) Ag
(c) Cu
(d) Ba
Option a – Mg
The highest volume of gases in the lower atmosphere is comprised of:
(a) Oxygen
(b) Hydrogen
(c) Nitrogen
(d) Carbon dioxide
Option c – Nitrogen
A thick paste of cement, sand, and water is called:
(a) R. C. C.
(b) Mortar
(c) Kiln
(d) Concrete
Option b – Mortar
The metal used for making aircraft and rockets is:
(a) Lead
(b) Nickel
(c) Copper
(d) Aluminium
Option c – Copper
The first organic compound synthesized in the laboratory was:
(a) Glucose
(b) Urea
(c) Uric acid
(d) Lactic acid
Option b – Urea
Ultra-purification of a metal is done by:
(a) Leaching
(b) Smelting
(c) Slugging
(d) Zone melting
Option d – Zone melting
Name two elements that find wide application in the transistor industry:
(a) Silicon and Germanium
(b) Tungsten and Platinum
(c) Carbon and Platinum
(d) Indium and Germanium
Option a – Silicon and Germanium
Uranium eventually decays into a stable isotope of:
(a) Thorium
(b) Lead
(c) Polonium
(d) Radium
Option b – Lead
Which of the following chemicals is responsible for depletion of the ozone layer in the atmosphere?
(a) Carbon dioxide
(b) Nitrous oxide
(c) Sulphur dioxide
(d) Chlorofluorocarbons
Option d – Chlorofluorocarbons
Ultraviolet rays can be used in water treatment as:
(a) Precipitator
(b) Hydrolyser
(c) Disinfectant
(d) Flocculator
Option c – Disinfectant
The refrigerant ‘FREON’ is:
(a) Fluorspar and Felspar
(b) Calcium Tetra Fluoride
(c) Hydrofluosilicic acid
(d) Difluoro Dichloro Methane
Option d – Difluoro Dichloro Methane
Impure Camphor is purified by:
(a) Sublimation
(b) Steam distillation
(c) Fractional distillation
(d) Fractional Crystallization
Option a – Sublimation
Radioactive disintegration of uranium ultimately results in the formation of:
(a) Lead
(b) Radium
(c) Polonium
(d) Thorium
Option a – Lead
Which of the following alloys is used in making magnets?
(a) Stainless steel
(b) Magnalium
(c) Duralumin
(d) Alnico
Option d – Alnico
Which among the following is not a gemstone?
(a) Cat’s eye
(b) Opal
(c) Pearl
(d) Topaz
Option a – Cat’s eye
Which of the following is used as a lubricant in heavy machines?
(a) Sulphur
(b) Graphite
(c) Bauxite
(d) Phosphorus
Option b – Graphite
Which of the following is a natural dye?
(a) Alizarin
(b) Crystal violet
(c) Aniline blue
(d) Phenolphthalein
Option a – Alizarin
Which of the following imparts deep blue color to glass?
(a) Nickel oxide
(b) Cobalt oxide
(c) Ferrous oxide
(d) Cupric oxide
Option a – Nickel oxide
The function of the skimming tank in sewage treatment is to remove:
(a) Suspended solids
(b) Oil and fatty substances
(c) Inorganic substances
(d) Gritty substances
Option b – Oil and fatty substances
Nucleons are regarded as composite sub-particles known as:
(a) Photons
(b) Mesons
(c) Quarks
(d) Leptons
Option c – Quarks
Which of the following appeared to have a significant potential for accumulation through food chains?
(a) Lindane
(b) Carbaryl
(c) Parathion
(d) DDT
Option d – DDT
Which of the following is a natural dye?
(a) Alizarin
(b) Crystal violet
(c) Aniline blue
(d) Phenolphthalein
Option a – Alizarin
Drinking soda is –
(a) Neutral
(b) Acidic
(c) Alkaline
(d) Oxidant
Option b – Acidic
‘Milk Sugar’ is –
(a) Maltose
(b) Sucrose
(c) Galactose
(d) Lactose
Option d – Lactose
Among the following, which is always found in a free state in nature?
(a) Silver
(b) Gold
(c) Copper
(d) Sodium
Option b – Gold
Which type of radiations are absorbed by the upper layer of the atmosphere?
(a) Infrared
(b) Visible
(c) Radio waves
(d) Ultraviolet
Option d – Ultraviolet
Slag is a name given for –
(a) Molten alumina
(b) Molten iron
(c) Molten sand
(d) Molten calcium silicate
Option a – Molten alumina
Supersonic jets cause pollution by thinning of –
(a) CO₂ layer
(b) O₃ layer
(c) SO₂ layer
(d) O₂ layer
Option b – O₃ layer
The chief constituent of vinegar is –
(a) Acetic acid
(b) Formic acid
(c) Oxalic acid
(d) Salicylic acid
Option a – Acetic acid
Aspirin is chemically known as –
(a) Hydroxy salicylate
(b) Alkyl salicyclic acid
(c) Methyl salicylate
(d) Acetyl salicylic acid
Option d – Acetyl salicylic acid
Detergents clean surfaces on the principle of –
(a) Elasticity
(b) Viscosity
(c) Surface tension
(d) Floatation
Option c – Surface tension
Denatured spirit is ethanol mixed with –
(a) Kerosene
(b) Petrol
(c) Water
(d) Pyridine
Option d – Pyridine
When Formaldehyde and Potassium hydroxide are heated, we get –
(a) Methyl alcohol
(b) Methane
(c) Acetylene
(d) Ethyl formate
Option a – Methyl alcohol
Which one of the following organic compounds has a fruity smell?
(a) Ester
(b) Alcohol
(c) Ether
(d) Aldehyde
Option a – Ester
Impure camphor is purified by –
(a) Sublimation
(b) Steam distillation
(c) Fractional distillation
(d) Fractional crystallization
Option a – Sublimation
The wire of flash bulbs is made up of –
(a) Ba
(b) Ag
(c) Mg
(d) Cu
Option c – Mg
Magnetite is –
(a) Fe3O4
(b) Fe₂O₃
(c) FeCO₃
(d) 2Fe₂O₃·H₂O
Option a – Fe3O4
The degree of dissociation of an electrolyte depends on –
(a) Atmospheric pressure
(b) Dilution
(c) Impurities
(d) Method of dissolution
Option b – Dilution
An example of a heterocyclic compound is –
(a) Furan
(b) Benzene
(c) Anthracene
(d) Naphthalene
Option a – Furan
Sulphuric acid is –
(a) Monobasic
(b) Dibasic
(c) Tribasic
(d) Tetrabasic
Option b – Dibasic
The filter over which sewage is sprinkled is called –
(a) Contact bed
(b) Percolating filter
(c) Trickling filter
(d) Intermittent filter
Option c – Trickling filter
Ozone hole formation is observed in –
(a) India
(b) Europe
(c) Antarctica
(d) Africa
Option c – Antarctica
Saccharin is made up of –
(a) Phenol
(b) Butane
(c) Propane
(d) Toluene
Option d – Toluene
Which of the following metals forms an amalgam with other metals?
(a) Lead
(b) Tin
(c) Zinc
(d) Mercury
Option d – Mercury
Which of the following compounds is commonly used as an antiseptic in mouthwashes and toothpaste?
(a) Saltpeter
(b) Sodium chloride
(c) Borax
(d) Hydrogen peroxide
Option b – Sodium chloride
Type metal used in printing press is an alloy of –
(a) Lead and copper
(b) Lead and zinc
(c) Lead and bismuth
(d) Lead and antimony
Option c – Lead and bismuth
In electro-refining, the pure metal is deposited on –
(a) Cathode
(b) Anode
(c) Vessel
(d) Electrolyte
Option a – Cathode
Which is not an anesthetic agent in surgical operations?
(a) Ether
(b) Chloroform
(c) Acetone
(d) Nitrous oxide
Option c – Acetone
Sweat contains water and –
(a) Vinegar
(b) Salt
(c) Lactic acid
(d) Citric acid
Option b – Salt
Radiation that is not emitted during radioactivity is –
(a) Alpha rays (α-rays)
(b) Beta rays (β-rays)
(c) Gamma rays (γ-rays)
(d) Cathode rays
Option d – Cathode rays
The compound that has the least value for the octane number is –
(a) n-Heptane
(b) Iso-octane
(c) 2-Methyl heptane
(d) 2,2-Dimethyl hexane
Option a – n-Heptane
The amount of oxygen in the atmosphere remains relatively constant because it is given off by –
(a) Animals
(b) Plants
(c) Rocks
(d) Oceans
Option b – Plants
The number of atoms present in one mole of a gas at STP is –
(a) 6.023 × 10²⁰
(b) 6.023 × 10²³
(c) 6.02310²³
(d) 6.023 × 10²⁰
Option b – 6.023 × 10²³
Carborundum is another name for –
(a) Calcium oxide
(b) Silicon oxide
(c) Silicon carbide
(d) Calcium carbide
Option c – Silicon carbide
Interveinal necrotic spots on leaves appear due to –
(a) SO₂ injury
(b) HF injury
(c) NO₂ injury
(d) O₃ injury
Option a – SO₂ injury
The antiseptic compound present in Dettol is –
(a) Iodine
(b) Cresol
(c) Biothional
(d) Chloroxylenol
Option d – Chloroxylenol
Iodine value is used to estimate –
(a) Alkali content in oil
(b) Hydroxyl groups in oil
(c) Unsaturation in oil
(d) Carboxylic groups in oil
Option c – Unsaturation in oil
Bayer’s reagent is –
(a) Bromine water
(b) Hydrogen peroxide
(c) Alkaline potassium permanganate
(d) Acidified potassium permanganate
Option c – Alkaline potassium permanganate
The polymer obtained by the condensation of hexamethylenediamine and adipic acid is –
(a) Terylene
(b) Bakelite
(c) Tollen’s
(d) Nylon 66
Option d – Nylon 66
The unit to measure the flow of water is –
(a) Ohm meter
(b) Millicurie
(c) Micro Mho
(d) Cusecs
Option d – Cusecs
Which of the following is colorless?
(a) Oxygen
(b) Sulfur
(c) Chlorine
(d) Phosphorus
Option a – Oxygen
PVC is obtained by the polymerization of –
(a) Acetylene
(b) Propane
(c) Styrene
(d) Vinyl chloride
Option d – Vinyl chloride
Organic food is supposed to be better for human consumption because –
(a) It depends on chemicals and fertilizers that are expensive to buy
(b) It is grown without the use of chemical and synthetic pesticides
(c) It is grown in a glasshouse
(d) It is grown in an airtight environment
Option c – It is grown in a glasshouse
The ‘King of Metals’ is –
(a) Iron
(b) Silver
(c) Gold
(d) Aluminium
Option c – Gold
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