+100 Questions Chemistry (MCQ) and Answer
Q101.
A polymeric substance used to make parachute is
(a) Rayon
(b) Viscose
(c) Cotton
(d)Terylene
Q102.
Drinking soda is
(a)(I) Alkaline
(b) Acidic
(c) Neutral
(d) Oxidant (BSC
Q103.
The cathode of a lead storage battery is made up of
(a) Zinc
(b) Lead
(c) Lead oxide
(d) Manganese dioxide
Q104.
Which one of the following is radioactive ?
(a) Cesium
(b) Platinum
(c) Strontium
(d) Thorium
Q105.
Aluminum can be purified by
(a) oxidation
(b) distillation
(c) electrolysis
(d) ozonolysis
Q106.
Impure camphor is purified by
(a) sublimation
(b) fractional crystallisation
(c) fractional distillation
(d) steam distillation
Q107.
Greenhouse effect is caused by
(a) nitrogen
(b) carbon dioxide
(c) carbon monoxide
(d) nitrogen dioxide
Q108.
Type metal used in printing press is an alloy of
(a) lead and copper
(b) lead and antimony
(c) lead and bismuth
(d) lead and zinc.
Q109.
Sour taste of Coca Cola is due to the presence of
(a) acetic acid
(b) phosphoric acid
(c) hydrochloric acid
(d) formic acid
Q110.
Bhopal gas tragedy is associated with leakage of
(a) carbon dioxide
(b) nitrogen dioxide
(c) Sulphur dioxide
(d) methyl isocynate
Q111.
Iodized salt is beneficial for
(a) lowering of blood pressure
(b) prevention of dehydration
(c) thyroid function
(d) salivary glands
Q112.
The acid rain destroys vegetations because it contains
(a) nitric acid
(b) ozone
(c) carbon monoxide
(d) sulphuric acid
Q113.
Diamonds are glittering and attractive because light
Incident on them undergoes
(a) highest refraction
(b) multiple internal reflections
(c) multiple surface reflections
(d) hundred percent transmission
Q114.
The substance most commonly used as a food
preservative is
(a) sodium carbonate
(b) tartaric acid
(c) acetic acid
(d) sodium salt of benzoic acid
Q115.
Catalyst is a substance which
(a) increases the rate of the reaction
(b) decreases the rate of reaction
(c) has no action on the rate of the reaction
(d) None of these
Q116.
Which of the following gases is most toxic?
(a) Carbon dioxide
(b) Carbon monoxide
(c) Sulphur dioxide
(d) Chlorine
Q117.
Sour milk contains
(a) acetic acid
(b) tartaric acid
(c) citric acid
(d) lactic acid
Q118.
The acid used in lead storage cells is
(a) phosphoric acid
(b) hydrochloric acid
(c) nitric acid
(d) sulphuric acid
Q119.
Alum stops bleeding in minor cuts because of
(a) salvation
(b) emulsion
(c) dialysis
(d) coagulation
Q120.
Plaster of Paris is made by partial dehydration of
(a) Epsom salt
(b) gypsum salt
(c) blue vitriol
(d) green vitriol
Q121.
Water can be separated from alcohol water mixture
by
(a) decantation
(b) evaporation
(c) distillation
(d) sublimation
Q122.
Milk Sugar is
(a) Lactose
(b) Maltose
(c) Galactose
(d) Sucrose
Q123.
Petroleum is a mixture of
(a) elements
(b) hydrocarbons
(c) polymers
(d) salts
Q124.
( The gas used for filling weather balloons is
(a) helium
(b) hydrogen
(c) air
(d) nitrogen
Q125.
Hydrogen is not found In atmosphere because
(a) it is highly inflammable
(b) it is the lightest gas
(c) it is absorbed by plants
(d) it immediately combines with oxygen to form
water
Q126.
Who discovered the atom bomb?
(a) Madam Curie
(b) Pierre Curie
(c) Otto Hahn
(d) Albert Einstein
Q127.
Which one of the following organic compounds has
fruity smell?
(a) Alcohol
(b) Aldehyde
(c) Ester
(d) Ether
Q128.
What material is used to make electric heater coil ?
(a) Copper
(b) Iron
(c) Silver
(d) Nichrome
Q129.
Byproduct obtained by soap industry is
(a) Caustic soda
(b) Glycerol
(c) Naphthalene
(d) Caustic potash
Q130.
Polythene is polymer of
(a) Ethylene
(b) Propylene
(c) Acetylene
(d) Aniline
Q131.
When formaldehyde and potassium hydroxide are
heated we get
(a) Acetylene
(b) Methyl alcohol
(c) Methane
(d) Ethyl formate
Q132.
When cone H2S04 is added to dry KNO3 brown
fumes are evolved. These fumes are due to
(a) S03
(b) S02
(c) N02
(d) N2O
Q133.
The polymer used in making plastic crockery is
(a) Decron
(b) Nylon
(c) Bakelite
(d) Melamine
Q134.
Vulcanization of rubber is carried out by adding
(a) Sulphur
(b) Carbon
(c) Ozone
(d) Phosphorus
Q135.
Which gas is used as fire extinguisher?
(a) Carbon dioxide
(b) Carbon monoxide
(c) Carbon suboxide
(d) Sulphur dioxide
Q136.
Which one of the following is extensively used for
sterilizing water ?
(a) Bleaching powder
(b) Alum
(c) Borax powder
(d) Soda powder
Q137.
The major constituent of air is
(a) nitrogen
(b) carbon dioxide
(c) oxygen
(d) hydrogen
Q138.
Rusting of iron takes place due to
(a) oxidation
(b) carbonation
(c) exfoliation
(d) corrosion
Q139.
German silver used for making utensils is an alloy of
(a) copper silver nickel
(b) copper zinc nickel
(c) copper zinc aluminium
(d) copper nickel aluminium
Q140.
The purity of gold is expressed in carats. The purest
form of goldis.
(a) 24 carats
(b) 6 carats
(c) 916 carats
(d) 22 carats
Q141.
Petroleum consists of a mixture of
(a) Carbohydrates
(b) Carbonates
(c) Hydrocarbons
(d) Carbide?
Q142.
The lustre of the metals is because of
(a) high density due to closed packing of atoms
(b) high polish
(c) reflection of light due to the presence of free
electrons
(d) absorption of light due to the presence of cavities
Q143.
One of the following is used to dissolve noble metals.
That is
(a) Nitric acid
(b) Hydrochloric acid
(c) Sulphuric acid
(d) Aqua ragla
Q144.
An emulsion is a colloid of a
(a) gas in a liquid
(b) liquid in a liquid
(c) liquid in a gas
(d) gas in a solid
Q145.
Percentage of carbon in steel i ranges from
(a) 1 to 5
(b) 5 to 0
(c) 0 to 0
(d) 0 to 0
Q146.
Which of the following is not present in German
silver?
(a) Copper
(b) Nickel
(c) Silver
(d) Zinc
Q147.
The major harmful gas emitted by automobile
vehicles which causes air pollution is
(a) Carbon Monoxide
(b) Methane
(c) Carbon dioxide
(d) Ozone gas
Q148.
Which one of the following is a major greenhouse
gas?
(a) Carbon dioxide
(b) Chloro fluorocarbon
(c) Carbon monoxide
(d) Freon
Q149.
Pasteurization is the process in which milk is heated
to
(a) 60°C for 10 minutes .
(b) 63° C for 20 minutes
(c) 63°C for 30 minutes
(d) 72°C for 10 minutes
Q150.
The freezer in a refrigerator isfitted near the top
(a) to keep it away from hot compressor which is
nearer to the bottom
(b) because of convenience
(c) it facilitates convection currents .
(d) to minimize power consumption
Q151.
The chemical name of Common salt is
(a) Sodium chloride
(b) Sodium nitrate
(c) Ammonium chloride
(d) Calcium chloride
Q152.
Denatured spirit is ethanol mixed with
(a) Petrol
(b) Kerosene
(c) Water
(d) Pyridine
Q153.
The most abundant inert gas in the atmosphere is
(a) Helium
(b) Neon
(c) Argon
(d) Krypton
Q154.
Which metal is extracted from seawater?
(a) Potassium
(b) Magnesium
(c) Aluminium
(d) Beryllium
Q155.
Percentage of lead in lead pencils is
(a) 0
(b) 66
(c) 40
(d) 80
Q156.
Water is not effective in extinguishing a fire caused
by petrol because
(a) die flame is too hot for water to cool it down
(b) water and petrol react chemically
(c) water and petrol are miscible with each other
(d) water and petrol are immiscible with each other
and petrol which forms the upper layer continues to
bum
Q157.
Helium gas is used in gas balloons instead of
hydrogen gas because it is
(a) lighter than hydrogen
(b) more abundant than hydrogen
(c) noncombustible
(d) more stable
Q158.
The gas used in the artificial ripening of fruits is
(a) Acetylene
(b) Methane
(c) Ethane
(d) Butane
Q159.
Ruby and sapphire are oxides of
(a) copper
(b) tin
(c) iron
(d) aluminium
Q160.
The gas which turns into liquid at the lowest
temperature among the following is
(a) hydrogen
(b) oxygen
(c) helium
(d) nitrogen
Q161.
Gunpowder consist ofa mixture of
(a) sand and TNT
(b) TNT and charcoal
(c) nitre Sulphur and charcoal
(d) Sulphur sand and charcoal
Q162.
In nuclear reactors graphite is used as a an
(a) fuel
(b) lubricant
(c) moderator
(d) insulator
Q163.
Sea water can be purified by the process of
(a) distillation
(b) evaporation
(c) filtration
(d) fractional distillation
Q164.
Detergents clean surfaces on the principle of
(a) viscosity
(b) surface tension
(c) elasticity
(d) floatation
Q165.
The compound to which H2 does not add is
(a) Biphenyl ethylene
(b) Tetraphenyl ethylene
(c) Tetraanaphthylethylene
(d) Tetra phenanthrylethylene
Q166.
Ammonia is a mixture of
(a) aluminium powder and ammonium nitrate
(b) aluminium powder and ammonium chloride
(c) aluminium powder and ammonium sulphate
(d) aluminium powder and potassium nitrate
Q167.
Which gas does not form the part of atmosphere ?
(a) Nitrogen
(b) Helium
(c) Chlorine
(d) None of the above
Q168.
The fuel used in an atomic reactor is
(a) Coal
(b) Petrol
(c) Combustable gases
(d) Uranium
Q169.
White coal is
(a) Uranium
(b) Hydroelectricity
(c) Diamond
(d) Ice
Q170.
The major constituent of gobar gas is
(a) Carbon dioxide
(b) Methane
(c) Butane
(d) isobutane
Q171.
The residue left after extracting juice from sugar beet
and sugarcane is called
(a) molasses
(b) bagasse
(c) whey
(d) biomass
Q172.
The isotope of Uranium used in atomic reactors is
(a) U235
(b) U236
(c) U237
(d) U232
Q173.
The greenhouse effect is caused by the higher level of
which gas in the atmosphere ?
(a)Carbon monoxide
(b) Carbon dioxide
(c) Nitrous oxide
(d) Sulphur dioxide
Q174.
Candle is a mixture of
(a) Paraffin was and stearic acid
(b) Bees wax and stearic acid
(c) Higher fatty acids and stearic acid
(d) Bees wax and paraffin wax
Q175.
Ethanol containing 5%. water is known as
(a) rectified spirit
(b) denatured spirit
(c) methylated alcohol
(d) power alcohol
Q176.
The important ore of aluminium is
(a) bauxite
(b) cryolite
(c) fluorspar
(d) haematite
Q177.
Aqua regia is a 1:3 mixture by volume of
(a) conc. nitric acid and cone hydrochloric acid
(b) cone hydrochloric acid and cone nitric acid
(c) cone nitric acid and cone sulphuric acid
(d) conc. sulphuric acid and cone nitric acid
Q178.
What is the maximum Water Vapour content in the
atmosphere?
(a) 2 to 3 per cent
(b) 3 to 4 per cent
(c) 4 to 5 per cent
(d) 5 to 6 per cent
Q179.
The amount of chlorine available in water after
disinfection is: called as
(a) free chlorine
(b) residual chlorine
(c) free available chlorine
(d) combined available chlorine
Q180.
What are the major pollutants of cigarette smoke?
(a) Carbon monoxide and dioxin
(b) Carbon monoxide and nicotine
(c) Carbon monoxide and benzene
(d) Dioxin and benzene
Q181.
Nuclear energy is a mineralbased energy source. It is
derived from
(a) uranium
(b) thorium
(c) plutonium
(d) All of the above
Q182.
Zinc sulphide is commonly used as
(a) fungicide
(b) herbidide
(c) rodenticide
(d) deodorant
Q183.
The purest form of water is
(a) tap water
(b) rainwater
(c) groundwater
(d) distilled water
Q184.
The main constituent of biogas is
(a) oxygen
(b) methane
(c) acetic acid
(d) methyl alcohol
Q185.
Aspirin is chemically known as
(a) methyl salicylate
(b) hydroxysalicylate
(c) acetylsalicyclic acid
(d) alkylsalicylic acid
Q186.
The most abundant element in the human body is
(a) carbon
(b) iron
(c) nitrogen
(d) oxygen
Q187.
Which of the following is riot a greenhouse gas ?
(a) Hydrogen
(b) Carbon dioxide
(c) Nitric oxide
(d) Chlorofluorocarbon
Q188.
Wax used for making candle is chemically a mixture
of
(a) aliphatic hydrocarbons
(b) aromatic hydrocarbons
(c) cyclic hydrocarbons
(d) aliphatic and aromatic hydrocarbons
Q189.
Litmus is obtained from
(a) a bacterium
(b) a fungus
(c) an algae
(d) lichen
Q190.
Vinegar made by fermentation from cane sugar
contains
(a) palmitic acid
(b) lactic acid
(c) citric acid
(d) acetic acid
Q191.
Photo oxidation process is initiated by
(a) light
(b) heat
(c) oxygen
(d) catalyst
Q192.
Ultraviolet radiation striking this earth is due to the
depletion of
(a) carbon monoxide
(b) carbon dioxide
(c) ozone
(d) oxygen
Q193.
Major gaseous pollutant of the thermal power station
is
(a) H2S
(b)NH3
(c) NO2
(d) S02
Q194.
The process of removing calcium and magnesium
from hard water is known as
(a) Sedimentation
(b) Filtration
(c) Flocculation
(d) Water softening
Q195.
The tip of the matchstick contains
(a) phosphor us pentoxide
(b) white phosphorus
(c) red phosphorus
(d) phosphorus trichloride
Q196.
Commercially sodium bicarbonate is known as
(a) Washing soda
(b) Baking soda
(c) Bleaching powder
(d) Soda ash
Q197.
An emulsifier is an agent which
(a) stabilises an emulsion
(b) aids the flocculation of an emulsion
(c) accelerates the dispersion
(d) homogenises an emulsion
Q198.
Mortar is a mixture of water sand and
(a) Slaked lime
(b) Quick lime
(c) Limestone
(d) Gypsum
Q199.
Which of the following substance is highly plastic ?
(a) Quartz
(b) Mica
(c) Granite
(d) Clay
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