+100 Important Chemistry Questions (test) and Answer
Q301.
The energy of the sun is mainly due to
(a) nuclear fission
(b) radioactivity
(c) heat
(d) nuclear fusion
Q302.
Gelatin is mostly used in making icecreams in order
to
(a) prevent making a colloid
(b) stabilise the colloid and prevent crystallisation
(c) stabilise mixture
(d) enrich the aroma
Q303.
Which of the following is used to remove ink and rust
stains on cloth?
(a) Oxalic acid
(b) Alcohol
(c) Ether
(d) Kerosene oil
Q304.
Two elements which can form a large number of
compounds are
(a) Carbon and Hydrogen
(b) Carbon and Nitrogen
(c) Carbon and Oxygen
(d) Carbon and Sulphur
Q305.
An inert gas mixed with oxygen given to patients
suffering from restricted breathing is
(a) Helium
(b) Krypton
(c) Radon
(d) Argon
Q306.
An example of major air pollutant is
(a) Oxygen
(b) Carbon monoxide
(c) Helium
(d) Carbon dioxide
Q307.
The Fungus which is used in the alcohol industry is .
(a) Mushroom
(b) Candida Aibicans
(c) Yeast
(d) Rhizopus
Q308.
Gold dissolves in
(a) Hydrochloric acid
(b) Nitric acid
(c) Aquaregia
(d) Acetic acid
Q309.
Which halide is used in making sensitive emulsion on
photograhic film?
(a) Sodium chloride
(b) Silver bromide
(c) Silver Iodide
(d) Silver chloride
Q310.
Among the following the hardest metal is
(a) Gold
(b) Iron
(c) Platinum
(d) Tungsten
Q311.
The element used in the manufacture of safety
matches is
(a) Phosphorous
(b) Magnesium
(c) Silicon
(d) Sulphur
Q312.
The material used in solar cells contains
(a) Tin
(b) Silicon
(c) Caesium
(d) Thallium
Q313.
Quartz is a crystalline form of
(a) Alumina
(b) Glass
(c) Silica
(d) Limestone
Q314.
When lime juice is dropped on baking soda brisk
effervescence takes place because the gas evolved is
(a) Hydrogen
(b) Oxygen
(c) Carbon dioxide
(d) All of them
Q315.
Which of the following is a supercooled liquid?
(a) Icecream
(b) Ammonia
(c) Glass
(d) Wood
Q316.
Which one of the following elements is least likely to
be found in commercial fertilisers?
(a) Nitrogen
(b) Phosphorous
(c) Potassium
(d) Silicon
Q317.
In the electroplating of gold the electrolyte used is?
(a) Gold chloride
(b) Gold nitrate
(c) Gold sulphate
(d) Potassium aurocyanide
Q318.
The acid present in red ants is
(a) Acetic acid
(b) Butyric acid
(c) Caproicacid
(d) Formic acid
Q319.
The metal extracted from Bauxite is
(a) Silver
(b) Copper
(c) Manganese
(d) Aluminum
Q320.
The metal chiefly used for galvanising iron is
(a) Zinc
(b) Mercury
(c) Cadmium
(d) Tin
Q321.
The wire of flash bulb is made of:
(a) Copper
(b) Barium
(c) Magnesium
(d) Silver
Q322.
The coloured discharge tubes foradvertisement
mainly contain
(a) Xenon
(b) Argon
(c) Helium
(d) Neon
Q323.
Muscle fatigue is caused by the accumulation of:
(a) Pyruvic acid
(b) Lactic acid
(c) Oxaiacetic acid
(d) Uric acid
Q324.
Baking soda is
(a) Potassium carbonate
(b) Sodium hydroxide
(c) Sodium carbonate
(d) Sodium bicarbonate
Q325.
What is the most common salt in sea water ?
(a) Calcium carbonate
(b) Potassium chloride
(c) Sodium chloride
(d) Magnesium sulphate
Q326.
The natural resource known as black gold is
(a) coal
(b) lead
(c) tin
(d) platinum
Q327.
This group of alumino silicate minerals is widely used
In making electrical insulators
(a) Bauxite
(b) Chromite
(c) Manganese
(d) Mica
Q328.
Which of the following is a renewable source of
energy ?
(a) Coal
(b) Geothermal powder
(c) Natural gas
(d) Uranium
Q329.
The acid which is secreted by the glands in the
stomach wall is
(a) sulphuric acid
(b) hydrochloric acid
(c) nitric acid
(d) phosphoric acid
Q330.
Dry ice is
(a) solid ammonia
(b) solid sulphur dioxide
(c) dry carbon dioxide gas
(d) solid carbon dioxide
Q331.
Cement containing excess amount of lime
(a) cracks during setting
(b) becomes more strong
(c) is slow setting
(d) is quick setting
Q332.
Which one of the following is a microelement?
(a) Chlorine
(b) Hydrogen
(c) Nitrogen
(d) Oxygen
Q333.
Rock salt is a mineral containing
(a) potassium
(b) magnesium
(c) sodium
(d) iron
Q334.
In a nuclear reactor the material use for absorbing
neutrons is
(a) zinc
(b) radium
(c) lead
(d) cadmium
Q335.
Solder metal is an alloy of
(a) lead and tin
(b) lead and antimony
(c) copper and zinc
(d) copper and tin
Q336.
Ozone depletion in the atmosphere is mainly caused
by
(a) sulphur dioxide
(b) nitrogen dioxide
(c) hydrogen sulphide
(d) chlorofluorocarbon
Q337.
Which of the following metals occurs In free state ?
(a) Copper
(b) Iron
(c) Zinc
(d) Lead
Q338.
Copper is refined by
(a) roasting
(b) oxidation
(c) electrolysis
(d) zone refining
Q339.
Which one of the following is used as preservative for
foodstuff ?
(a) Sodium Benzoate
(b) Picric acid
(c) Glycerine
(d) Sodium Chloride
Q340.
The element with highest first ionisation energy is
(a) hydrogen
(b) helium
(c) lithium
(d) sodium
Q341.
Carbon dioxide is
(a) a reducing agent
(b) an oxidising agent
(c) a dehydrating agent
(d) a bleaching agent
Q342.
An atom of an element has atomic number 17 and
mass number36 The number of neutrons in its
nucleus is
(a) 17
(b) 19
(c) 36
(d) 53
Q343.
The resources which can be used continuously year
after year ate called
(a) Biotic
(b) Abiotic
(c) Nonrenewable
(d) Renewable
Q344.
Refrigerators keep food unspoiled because
(a) at its low temperature bacteria and moulds are
Inactive
(b) at its low temperature the germs are killed
(c) at Its low temperature the germs are frozen
(d) it sterilises the food
Q345.
Which of the following elements is not present in
stainless steel?
(a) Iron
(b) Tungsten
(c) Chromium
(d) Nickel
Q346.
Select the one which is not a mixture:
(a) Air
(b) Gasoline
(c) LPG
(d) Distilled water
Q347.
When Hydrogen starts burning in air it produces ?
(a) Ammonia
(b) Water
(c) Methane
(d)(4 ) Carbonic Acid
Q348.
Mercury is a :
(a) solid metal
(b) liquid metal
(c) solid nonmetal
(d) liquid nonmetal
Q349.
Spirit in contact with body gives cool sensation
because it is :
(a) liquid
(b) transparent
(c) highly volatile
(d) a good conductor
Q350.
Taj Mahal is greatly affected due to :
(a) Tourists
(b) Acid rain
(c) Deforestation
(d) Sound pollution
Q351.
The most abundant constituent of atmospheric air is
(a) carbon
(b) hydrogen
(c) oxygen
(d) nitrogen
Q352.
Which mineral is the ore Of aluminium?
(a) Haematite
(b) Bauxite
(c) Magnetite
(d) Siderite
Q353.
Which gas is used for converting vegetable oils into
saturated fats ?
(a) H2
(b) 02
(c) CL2
(d) S02
Q354.
Chemical name of bleaching powder is
(a) Calcium chlorate
(b) Calcium hypochlorite
(c) Calcium chloro hypochlorite.
(d) Calcium bi chloride
Q355.
Alcoholic ( OH) group can be identified by
(a) Toliens Reagent Test
(b) Esterification Test
(c) FeCl3 Test
(d) Ozonolysis Reaction
Q356.
The total energy of revolving electron in an atom
(a) cannot be negative
(b) can have any value above zero
(c) can never be positive
(d) will always be positive
Q357.
435: Conduction band electrons have more mobility
than holes because they
(a) are lighter
(b) experience collision less frequently
(c) have negative charge
(d) needless energy to move them
Q358.
The mass number of a nucleus is.
(a) always less than its atomic number
(b) always more than its atomic number
(c) always equal to its atomic number
(d) sometimes more and sometimes equal to its
atomic number
Q359.
Identify the metal which is nontoxic in nature
(a) Chromium
(b) Gold
(c) Cadmium
(d) Cobalt
Q360.
The gas that usually causes explosions in coal mines
is
(a) Hydrogen
(b) Carbon monoxide
(c) Air
(d) Methane
Q361.
The chemical bahaviour of an atom depends upon
(a) the number of protons in its nucleus
(b) the number of neutrons in the nucleus
(c) the number of electrons orbiting around the
nucleus
(d) the number of nucleons in the nucleus
Q362.
A powerful eye irritant present in smog is
(a) nitric oxide
(b) Sulphur dioxide
(c) peroxyacetyl nitrate
(d) carbon dioxide
Q363.
When water itself combines chemically with some
element or mineral it is called
(a) Carbonation
(b) Desilication
(c) Hydration
(d) Oxidation
Q364.
The electronic configuration of an atom having
atomic number 20 is
(a) 2 8 10
(b) 2 6 8 4
(c) 2 8 8 2
(d) 2 10 8
Q365.
The most reactive among the halogens is
(a) Fluorine
(b) Chlorine
(c) Bromine
(d) Iodine
Q366.
The major component in the LPG is
(a) methane
(b) butane
(c) ethane
(d) propane
Q367.
KMN04 can be used as a an
(a) insecticide
(b) fertiliser
(c) pesticide
(d) disinfectant
Q368.
Which of the inert gases can form compounds?
(a) Helium
(b) Xenon
(c) Krypton
(d) Argon
Q369.
Burning pyrites ore gives out
(a) Carbon dioxide gas
(b) Sulphur dioxide gas
(c) Nitrogen dioxide gas .
(d) Nitric oxide gas:
Q370.
Which one of the following elements is used in the
manufacture of fertilizers?
(a) Fluorine
(b) Potassium
(c) Lead
(d) Aluminium
Q371.
Natural rubber is the polymer of:
(a) isoprene
(b) Styrene
(c) Butadiene
(d) Ethylene
Q372.
In addition to hydrogen the other abundant element
present on Suns surface is
(a) Helium
(b) Neon
(c) Argon
(d) Oxygen
Q373.
Which of the following is the major constituent of
LPG?
(a) Methane
(b) Ethane
(c) Propane
(d) Butane
Q374.
Ozone layer is present in
(a) Troposphere
(b) Ionosphere
(c) Stratosphere
(d) Exosphere
Q375.
An electric iron has a heating element made of:
(a) Copper
(b) Tungsten
(c) Nichrome
(d) Zinc Technical
Q376.
The process of covering water pipes made of Iron
with Zinc layer to prevent corrosion is called :
(a) Zinc plating
(b) Alloy formation
(c) Vulcanization
(d) Galvanization
Q377.
The particle required to continue the chain process of
Uranium fission is :
(a) Electron
(b) Proton
(c) Neutron
(d) Positron
Q378.
Which of the following is used to increase the
antiknocking property of petrol
(a) Tetramethyl lead
(b) Tetraethyl lead
(c) Trimethyl lead
(d) Triethyl lead
Q379.
The chiefsource for the production of nitrogeneous
fertilizers is :
(a) Ammonia
(b) Nitric acid
(c) Nitrogen
(d) Nitrogen dioxide
Q380.
The element used for making solar cells is
(a) Magnesium
(b) Sodium
(c) Calcium
(d) Silicon
Q381.
Which of the following is an iron ore ?
(a) Bauxite
(b) Magnetite
(c) Lignite
(d) Nitrite
Q382.
Which one of the following is an example of a gel ?
(a) Cheese
(b) Milk
(c) Face cream
(d) Shaving cream
Q383.
Bakelite is a copolymer of Phenol and
(a) Formaldehyde
(b) Acetaldehyde
(c) Benzaldehyde
(d) Cinnaldehyde
Q384.
When a spoon is to be electroplated with nickel the
spoon is
(a) dipped in a nickel sulphate solution
(b) made anode and a pure nickel rod the cathode
(c) made cathode and a pure nickel red the anode
(d) coated with nickel sulphate and dried
Q385.
The Bhopal tragedy was caused by the gas
(a) phosgene
(b) carbon monoxide
(c) methyl isocyanate
(d) chlorine
Q386.
Which one of the following contributes largely to the
greenhouse effect ?
(a) Ozone
(b) Carbon monoxide
(c) Carbon dioxide
(d) Water vapour
Q387.
Wood spirit is
(a) Methyl alcohol
(b) Ethyl alcohol
(c) Butyl alcohol
(d) Propyl alcohol
Q388.
Which of the following processes is used for the
production of Biodiesel?
(a) Transamination
(b) Transcription
(c) Trans esterification
(d) Translation
Q389.
One property of ammonia is
(a) it is insoluble in water.
(b) It is an odourless gas.
(c) It is a yellowish gas
(d) Its aqueous solution turns red litmus blue
Q390.
Find the odd one:
(a) Marble
(b) Chalk
(c) Limestone
(d) Slaked lime
Q391.
Of the following which one pollutes the air of abig city ?
(a) Copper
(b) Chromium
(c) Lead
(d) Calcium
Q392.
“Firefighting clothes” are made from
(a) Mica.
(b) Asbestos
(c) Talc
(d) Steatite
Q393.
Water gas is the mixture of
(a) carbon dioxide and hydrogen
(b) carbon monoxide and nitrogen
(c) carbon monoxide and hydrogen
(d) carbon dioxide and nitrogen
Q394.
Brass is made of
(a) copper and tin
(b) tin and lead
(c) copper and zinc
(d) copper tin and zinc
Q395.
Which type of fire extinguisher is used for petroleum
fire ?
(a) Foam type
(b) Soda acid type
(c) Powder type
(d) None of these
Q396.
The function of skimming tank in sewage treatment is
to remove
(a) oil and fatty substances
(b) suspended solids
(c) gritty substances
(d) inorganic substances
Q397.
Which one of the following is not a greenhouse gas ?
(a) Chlorofluorocarbons
(b) Methane
(c) Carbon dioxide
(d) Nitrogen
Q398.
Black lung disease occurs in people working in
(a) Electroplating industry
(b) Organic solvents industry
(c) Paint manufacturing industry
(d) Coalmines
Q399.
Which one of the following is known as the brown coal ?
(a) Anthracite
(b) Bituminous
(c) Coke
(d) Lignite
Q400.
The chief source of naphthalene is
(a) Coaltar
(b) Diesel
(c) Charcoal
(d) Camphor
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