Chemistry Questions Answers MCQs - General Science Objective Questions and Answers for Competitive Exams

(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]

(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]

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

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

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