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Chemistry - General Science MCQs for Competitive Exams | Page-9

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Download in pdf Chemistry multiple choice questions(mcqs) & answers. These general awareness quiz objective questions answers include mcqs on detergents, greenhouse gas, hard water etc.
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(81) Which of the following is not a greenhouse gas?
[A] hydrogen
[B] nitric oxide
[C] carbon dioxide
[D] chlorofluorocarbon

Comment

Answer: Option [A]
(82) The process of removing calcium and magnesium from hard water is known as
[A] Filtration
[B] Flocculation
[C] Sedimentation
[D] Water softening

Comment

Answer: Option [D]

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(83) Humberger effect is otherwise known as –
[A] Sodium pump
[B] Choloride shift
[C] Respiratory product
[D] Anaerobic metabolism

Comment

Answer: Option [B]
(84) Which of the following chemical materials is responsible for the depletion of ozone layer
[A] Nitrous oxide
[B] Sulphur dioxide
[C] Carbon dioxide
[D] Chlorofluorocarbon

Comment

Answer: Option [D]
(85) The gas used for artificial fruit ripening is
[A] Ethylene
[B] Ethane
[C] Methane
[D] Acetylene

Comment

Answer: Option [A]
(86) The metallic constituents of hard water are
[A] Magnesium, tin and iron
[B] Calcium, magnesium and iron
[C] Iron, tin and calcium
[D] Magnesium, calcium and tin

Comment

Answer: Option [B]
(87) Which of the following is used as filler in type of rubber
[A] Coal
[B] Coke
[C] Graphite
[D] Carbon black

Comment

Answer: Option [D]
(88) The advantage of detergents over soaps is
[A] Detergents are soluble in water
[B] Detergents could not give much lather
[C] Detergents give lather even with hard water
[D] Soaps give lather with only soft water

Comment

Answer: Option [C]
(89) Which variety of coal contains recognizable traces of the original plant material
[A] Peat
[B] Lignite
[C] Bitumen
[D] Anthracite

Comment

Answer: Option [A]
(90) Which of the following pairs of materials serves as electrodes in chargeable batteries commonly in devices such as torch, electric shavers etc.?
[A] Zinc and carbon
[B] Lead peroxide and lead
[C] Nickel and cadmium
[D] Iron and cadmium

Comment

Answer: Option [C]

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