+100 Questions Chemistry (MCQ) and Answer Important
Q201.
Carbon monoxide is an inflammable gas. Which one
of the following is also inflammable?
(a) Helium
(b) Nitrogen
(c) Oxygen
(d) Hydrogen
Q202.
Which one of the following metals does not react
with water to produce Hydrogen ?
(a) Potassium
(b) Cadmium
(c) Sodium
(d) Lithium
Q203.
Ozone consists of
(a) Oxygen only
(b) Oxygen and Nitrogen
(c) Hydrogen and Carbon
(d) Oxygen and Carbon
Q204.
One of the constituents of tear gas is
(a) Ethane
(b) Ethanol
(c) Ether
(d) Chloropicrin
Q205.
An atomic dock is based on transitions in
(a) Sodium
(b) Caesium
(c) Magnesium
(d) Aluminium
Q206.
Silver halides are used in photographic plates
because they are
(a) oxidised in air
(b) soluble in hyposolution
(c) reduced by light
(d) totally colourless
Q207.
Tetra ethyle lead (TEL) is
(a) a catalyst in burning fossil fuel
(b) an antioxidant
(c) a reductant
(d) an antiknock compound
Q208.
The isotope used for the production of atomic energy
is
(a) U-235
(b) U-238
(c) U-234
(d) U-236
Q209.
Which of the following is not a nucleon?
(a) Proton
(b) Neutron
(c) Electron
(d) Positron
Q210.
The material used in the manufacture of lead pencil is
(a) Graphite
(b) Lead
(c) Carbon
(d) Mica
Q211.
If all bullets could not be removed from gunshot
injury of a man it may cause poisoning by
(a) Mercury
(b) Lead
(c) Iron
(d) Arsenic
Q212.
German silver an alloy does not contain the metal
(a) Nickel
(b) Zinc
(c) Copper
(d) Silver
Q213.
Oxygen which is vital for life is a product of
photosynthesis and conies from
(a) carbonates from soil
(b) carbon dioxide
(c) water
(d) oxides of mineral elements
Q214.
The noble gas used in radiotherapy is
(a) neon
(b) argon
(c) radon
(d) xenon
Q215.
Steel contains
(a) 12% carbon
(b) 5-10% carbon
(c) more than 10% carbon
(d) no carbon
Q216.
The chemical(s) most commonly used for cloud
seeding or artificial rainmaking is are
(a) Silver Iodide
(b) Sodium Chloride
(c) Dry ice or frozen carbon dioxide
(d) All the above
Q217.
The substance that is added to make natural rubber
strong and more bouncy is
(a) Polythene
(b) Sponge
(c) Sulpher
(d) Chlorine
Q218.
White phosphorus is always kept under
(a) benzene
(b) kerosene
(c) ether
(d) water
Q219.
Galena is a mineral of
(a) Iron
(b) gold
(c) lead
(d) calcium
Q220.
Magnesium is an alloy of
(a) Aluminum and Magnesium
(b) Magnesium and Tin
(c) Aluminum and Zinc
(d) Manganese and Magnesium
Q221.
Galvanization of iron is carried out using
(a) Zinc
(b) Tin
(c) Copper
(d) Chromium
Q222.
Cooking gas is a mixture of
(a) methane and ethylene
(b) carbon dioxide and oxygen
(c) butane and propane
(d) carbon monoxide and carbon dioxide
Q223.
Dry powder fire extinguishers contain
(a) sand
(b) sand and sodium carbonate
(c) sand and potassium carbonate
(d) sand and sodium bicarbonate
Q224.
Which type of glass is used for making glass
reinforced plastic?
(a) Pyrex glass
(b) Flint glass
(c) Quartz glass
(d) Fibre glass
Q225.
Two elements which are used to absorb neutrons to
control the chain reaction during nuclear fission are
(a) Boron and Cadmium
(b) Boron and Plutonium
(c) Cadmium and Uranium
(d) Uranium and Boron
Q226.
The most commonly used chemicals in the artificial
rainmaking or cloud seeding are
(a) Silver Iodide (AgI)
(b) Sodium Chloride (NaCl)
(c) Dry Ice (Frozen CO2)
(d) All of the above
Q227.
Which ofthe following can be used to absorb neutrons
to control the chain reaction during nuclear fission?
(a) Boron
(b) Heavy water
(c) Uranium
(d) Plutonium
Q228.
Hydrogen bomb is based on the principle of
(a) controlled fission reaction
(b) uncontrolled fission reaction
(c) controlled fusion reaction
(d) uncontrolled fusion reaction
Q229.
Supersonic Jet causes pollution by thinning of
(a) O2 layer
(b) O2 layer
(c) S02 layer
(d) CO2 layer
Q230.
Which type of glass is used for making glass
reinforced plastic?
(a) Pyrex glass
(b) Flint glass
(c) Quartz glass
(d) Fibre glass
Q231.
Which of the following metals causes ItaiItal disease ?
(a) Cadmium
(b) Chromium
(c) Cobalt
(d) Copper
Q232.
Glycol is added to aviation gasoline because it
(a) reduces evaporation of petrol
(b) increases efficiency of petrol
(c) prevents freezing of petrol
(d) reduces consumption of petrol
Q233.
Which one of the following minerals is found in
Mona2ite sand ?
(a) Potassium
(b) Uranium
(c) Thorium
(d) Sodium
Q234.
Nowadays yellow lamps are frequently used as street
lights. Which of the following gases is used in these
lamps ?
(a) Sodium
(b) Neon
(c) Hydrogen
(d) Nitrogen
Q235.
Which of the following could be used as fuel in
propellant or rockets ?
(a) Liquid Hydrogen + Liquid Nitrogen
(b) Liquid Oxygen + Liquid Argon
(c) Liquid Nitrogen + Liquid Oxygen
(d) Liquid Hydrogen + Liquid Oxygen
Q236.
The addition of gypsum to Portland cement helps in :
(a) increasing the strength of cement
(b) rapid setting of cement
(c) preventing rapid setting of cement
(d) reduction in the cost of cement
Q237.
The constituents of automobile exhaust that can
cause cancer is are :
(a) Oxides of nitrogen
(b) Carbon monoxide
(c) Polycyclic hydrocarbons y
(d) Lead
Q238.
Hard steel contains
(a) 2 to 5 per cent carbon
(b) 5 to 5 per cent carbon
(c) 1 to 4 per cent carbon
(d) 01 to 04 per cent carbon
Q239.
Cement is formed by strongly heating a mixture of
(a) limestone and graphite
(b) limestone and clay
(c) chalk and graphite.
(d) clay and graphite
Q240.
Glass is a
(a) superheated solid
(b) super cooled liquid
(c) super cooled gas
(d) superheated liquid .
Q241.
The temperature of oxyacetylene flame is around
(a) 2800°C
(b) 3200°C
(c) 4000°C
(d) 1500°C
Q242.
The RefrigerantFREONis
(a) Calcium Tetra Fluoride
(b) Difluoro Dichloro Methane
(c) Fluorspar and Felspar
(d) HydrofluosllicicAcid
Q243.
Glass is a
(a) pure solid
(b) supercooled liquid
(c) gel
(d) polymer
Q244.
Stainless steel is an alloy of
(a) chromium and carbon
(b) chromium carbon and iron
(c) chromium and iron
(d) carbon and iron
Q245.
For generation of biogas the materials commonly
used are
(a) Animal wastes
(b) Crop residues
(c) Aquatic plants
(d) Forest residues.
Q246.
Raw materials used for the manufacture of glass are
(a) sand soda limestone
(b) sand charcoal soda
(c) limestone charcoal sulphur
(d) sand sulphur soda
Q247.
Which of the following is used in welding broken
pieces of iron rails and machine parts?
(a) Aluminium sulphate
(b) Solder
(c) Aluminium powder
(d) None of the above
Q248.
The BOD values of water indicate the
(a) amount of organic debris
(b) amount of oxygen used for biochemical oxidation
(c) amount of oxygen used for biochemical reduction
(d) amount of ozone used for biochemical oxidation
Q249.
Which of the following in automobile exhaust can
cause cancer?
(a) Oxides of nitrogen
(b) Carbon monoxide
(c) Lead
(d) Polyclinic hydrocarbons
Q250.
Bleaching powder is used in drinking water as a an
(a)(X) disinfectant
(b) antibiotic
(c) antiseptic
(d) coagulant
Q251.
The iron ore which contains 72% of iron is :
(a) Magnetite
(b) Limonite
(c) Haematite
(d) Siderite
Q252.
Cement is usually a mixture of
(a) Calcium silicate and calcium aluminate
(b) Calcium silicate and calcium ferrate.
(c) Calcium aluminate and calcium ferrate
(d) Lime stone and silicon dioxide
Q253.
The atmospheric gas that is mainly responsible for
Green House effect :
(a) Ozone
(b) Nitrogen
(c) Oxygen
(d) Carbon dioxide
Q254.
Electric bulbs are filled with :
(a) Nitrogen
(b) Carbon dioxide
(c) Argon
(d) Oxygen
Q255.
The gas that is used in the manufacture of vanaspati
ghee is :
(a) Oxygen
(b) Carbon dioxide
(c) Hydrogen
(d) Nitrogen
Q256.
The anode of a dry cell is made up of
(a) Iron
(b) Cadmium
(c) Zinc
(d) Lead
Q257.
An example of semiconductor is
(a) Germansilver
(b) Germanium
(c) Phosphorous
(d) Arsenic
Q258.
Nonstick kitchenwares are coated with
(a) FVC
(b) Graphite
(c) Teflon
(d) Silicon
Q259.
Gobar gas basically contained
(a) Carbon dioxide
(b) Carbon monoxide
(c) Hydrogen sulphide
(d) Methane
Q260.
The chief constituent of vinegar is
(a) Formic acid
(b) Acetic acid
(c) Salycylic acid
(d) Oxalic acid
Q261.
Sea weeds are important source of
(a) iron
(b) chlorine
(c) bromine
(d) iodine
Q262.
The fiber least prone to catch fire is
(a) nylon
(b)(2 ) polyester
(c) cotton
(d) terylene
Q263.
Setting of plaster of Paris involves
(a) dehydration process
(b) hydration to form other hydrates
(c) oxidation process
(d) reduction process
Q264.
The common name for the compound having formal
NaOH is
(a) Caustic soda
(b) Caustic potash
(c) Soda ash
(d) Sodium hydroxide
Q265.
Which one of the following is found in kidney stones?
(a) Sodium oxalate
(b) Calcium oxalate
(c) Sodium chloride
(d) Calcium acetate
Q266.
Bone ash contains
(a) Calcium sulphate
(b) Phosphoric sulphate
(c) Calcium phosphate
(d) Calcium hypophosphate
Q267.
Helium gas is filled in ballons because
(a) its atomic number is 2
(b) it is lighter than air
(c) it is one of the constituents of water
(d) it is a noble gas
Q268.
The ratio of pure gold in 18 carat gold is
(a) 100%
(b) 80%
(c) 75%
(d) 60%
Q269.
Which type of radiations are absorbed by the upper
layer of the atmosphere?
(a) Radiowaves
(b) Infrared
(c) Visible
(d) Ultraviolet
Q270.
An example of replenshible energy source is
(a) Coal
(b) Petroleum
(c) Lignite
(d) Biomass
Q271.
Which one of the following minerals is found in pure
form?
(a) Iron
(b) Copper
(c) Bauxite
(d) Manganese
Q272.
Tar roads get damaged if there is
(a) stagnation of water on road
(b) heavy traffic
(c) no maintenance
(d) no sloping
Q273.
The drugMarijuanais a
(a) sedative
(b) mental stimulant
(c) hallucinating substance
(d) tranquillizer
Q274.
The material known in commerce as Terylene is a
(a) Synthetic fibre
(b) Natural fibre
(c) Modified natural fibre
(d) Blend of cotton and silk
Q275.
Among the fuels given below the one with highest
calorific value is
(a) Coke
(b) Coal
(c) Wood
(d) Natural gas
Q276.
The chemical used in embalming biological materials
is
(a) formaldehyde in water
(b) formaldehyde in methanol
(c) ethyleneglycol
(d) gaseous formaldehyde
Q277.
Which of the following is a monoatomic gas?
(a) Oxygen
(b) Neon
(c) Nitrogen
(d) Fluorine
Q278.
Sodium bicarbonate is commercially known as
(a) Washing soda
(b) Baking soda
(c) Caustic soda
(d) Soda lime
Q279.
Tear gas used by the police to disperse the mob
contains
(a) Carbon dioxide
(b) Chlorine
(c) Ammonia
(d) Hydrogen sulphide
Q280.
Epsom salt is used
(a) as purgative
(b) in softening water
(c) in paper industry
(d) in making tooth paste
Q281.
The common refrigerant in domestic refrigerator is
(a) Neon
(b) Oxygen
(c) Nitrogen
(d) Freon
Q282.
The chemical name of “laughing gas is
(a) Nitric oxide
(b) Nitrogen dioxide
(c) Nitrogen pentoxide
(d) Nitrous oxide
Q283.
The chemical name of ratpoison is H
(a) zinc oxide
(b) potassium cyanide
(c) lead nitrate
(d) zinc phosphide
Q284.
Which one of the following pairs is NOT correctly
matched?
(a) Haematite: Copper
(b) Bauxite: Aluminium
(c) Monazite: Thorium
(d) Pitchblende : Uranium
Q285.
Which of the following is used for refrigeration?
(a) Sulphur dioxide
(b) Chlorine
(c) Freon
(d) Phosphine
Q286.
Which of the following is used to denature ethanol ?
(a) Methyl alcohol
(b) Propyl alcohol
(c) Phenol
(d) Methane
Q287.
The charcoal used to decolourise brown sugar
solution is
(a) Wood charcoal
(b) Coconut charcoal
(c) Animal charcoal
(d) Sugar charcoal
Q288.
The gas which is mainly responsible for the
greenhouse effect is:
(a) Ozone
(b) Oxygen
(c) Carbon dioxide
(d) Carbon monoxide
Q289.
Which one of the following is used for dating very old
objects of archaeological importance?
(a) Phosphorus
(b) Tritium
(c)Radium
(d) Carbon
Q290.
The main constituent of naturalgas is
(a) Methane
(b) Ethane
(b) Natural fibre
(c) Modified natural fibre
(d) Blend of cotton and silk
Q275.
Among the fuels given below the one with highest
calorific value is
(a) Coke
(b) Coal
(c) Wood
(d) Natural gas
Q276.
The chemical used in embalming biological materials
is
(a) formaldehyde in water
(b) formaldehyde in methanol
(c) ethyleneglycol
(d) gaseous formaldehyde
Q277.
Which of the following is a monoatomic gas?
(a) Oxygen
(b) Neon
(c) Nitrogen
(d) Fluorine
Q278.
Sodium bicarbonate is commercially known as
(a) Washing soda
(b) Baking soda
(c) Caustic soda
(d) Soda lime
Q279.
Tear gas used by the police to disperse the mob
contains
(a) Carbon dioxide
(b) Chlorine
(c) Ammonia
(d) Hydrogen sulphide
Q280.
Epsom salt is used
(a) as purgative
(b) in softening water
(c) in paper industry
(d) in making tooth paste
Q281.
The common refrigerant in domestic refrigerator is
(a) Neon
(b) Oxygen
(c) Nitrogen
(d) Freon
Q282.
The chemical name of “laughing gas is
(a) Nitric oxide
(b) Nitrogen dioxide
(c) Nitrogen pentoxide
(d) Nitrous oxide
Q283.
The chemical name of ratpoison is H
(a) zinc oxide
(b) potassium cyanide
(c) lead nitrate
(d) zinc phosphide
Q284.
Which one of the following pairs is NOT correctly
matched?
(a) Haematite: Copper
(b) Bauxite: Aluminium
(c) Monazite: Thorium
(d) Pitchblende : Uranium
Q285.
Which of the following is used for refrigeration?
(a) Sulphur dioxide
(b) Chlorine
(c) Freon
(d) Phosphine
Q286.
Which of the following is used to denature ethanol ?
(a) Methyl alcohol
(b) Propyl alcohol
(c) Phenol
(d) Methane
Q287.
The charcoal used to decolourise brown sugar
solution is
(a) Wood charcoal
(b) Coconut charcoal
(c) Animal charcoal
(d) Sugar charcoal
Q288.
The gas which is mainly responsible for the
greenhouse effect is:
(a) Ozone
(b) Oxygen
(c) Carbon dioxide
(d) Carbon monoxide
Q289.
Which one of the following is used for dating very old
objects of archaeological importance?
(a) Phosphorus
(b) Tritium
(c)Radium
(d) Carbon
Q290.
The main constituent of naturalgas is
(a) Methane
(b) Ethane
(c) Butane
(d) Propane
Q291.
Domestic cooking gas consists mostly of
(a) methane and ethane
(b) liquefied butane and isobutane
(c) hydrogen and acetylene
(d) ethylene and carbon monoxide.
Q292.
Which inetal does not undergo corrosion due to the
formation of oxide layer?
(a) Copper
(b) Iron
(c) Aluminium
(d) Zinc
Q293.
Submarines move under water. They have engines
that run on
(a) Petrol and oxygen
(b) Diesel
(c) Batteries
(d) Steam
Q294.
The Bhopal gas tragedy was caused by the gas
(a) Methyl chloride
(b) Methyl iso Cyanide
(c) Methyl iso Cyanate
(d) Methyl Cyanide
Q295.
In upper layer of atmosphere ozone is formed
(a) the action of ultraviolet rays on oxygen
(b) the combination of oxygen molecules
(c) subjecting oxygen to high pressure
(d) the action of nitrogen on oxygen in atmosphere
Q296.
Molasses a byproduct in the manufacture of sugar is
converted into
(a) alcohol
(b) paper
(c) fuel
(d) pulp
Q297.
Which of these acids is not organic in origin?
(a) Lactic acid
(b) Sulphuric acid
(c) Citric acid
(d) Oxalic acid
Q298.
Lead pencil contains
(a) lead
(b) ferrous sulphide
(c) lead sulphide
(d) graphite
Q299.
Solder is an alloy of
(a) lead zinc
(b) copper lead
(c) tin lead
(d) sodium lead
Q300.
Name two elements that find wide application in
transistor industry
(a) Silicon and Germanium
(b) Carbon and Platinum
(c) Iridium and Germanium
(d) Tungsten and Platinum
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