IAS/IPS Prelims Chemistry - General Awareness Multiple Choice Questions and Answers

51 Which one of the following is NOT radioactive ?

A Zirconium

B Tritium

C Francium

D Astatine

Answer: Option [A]

52 Which one of the following pairs of materials serves as electrodes in chargeable batteries commonly used in devices such as torchlights, electric shaver etc. ?

A Iron and Cadmium

B Lead peroxide and lead

C Zinc and Carbon

D Nickel and Cadmium

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Answer: Option [D]

53 A radioactive substance has a half- life of four months. Three-fourth of the substance would decay in

A 3 months

B 4 months

C 8 months

D 12 months

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Answer: Option [C]

54 The chemical used as a ‘fixer’ in photography is

A Borax

B Sodium sulphate

C Sodium thiosulphate

D Ammonium persulphate

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Answer: Option [C]

55 Consider the following statements:

I. Baking soda is used in fire extinguishers

II. Quick lime is used in the manufacture of glass

III. Gypsum is used in the manufacture of Plaster of Paris

Which of the statements given above is /are correct ?

A I and II

B II and III

C I only

D I, II and III

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Answer: Option [D]

56 Which one of the following does not contain silver ?

A German silver

B Lunar caustic

C Horn silver

D Ruby silver

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Answer: Option [A]

57 Lead, ingested or inhaled, is a health hazard. After the addition of lead to petrol has been banned, what still are sources of lead poisoning ?

I. Smelting units

II. Pens and pencils

III. Paints

IV. Hair oils and cosmetics

A I, II and III only

B I and III only

C II and IV only

D I,II, III and IV

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Answer: Option [B]

58 Which one of the following fuels causes minimum environmental pollution ?

A Coal

B Hydrogen

C Kerosene

D Diesel

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Answer: Option [B]

59 Consider the following chemicals:

I. Benzene

II. Carbon tetrachloride

III. Sodium carbonate

IV. Trichloroethylene

Which of the above/ is are used as dry cleaning chemical?

A I only

B II only

C I, II and IV only

D I, II, III and IV

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Answer: Option [C]

60 Which one of the following has the highest fuel value ?

A Gasoline

B Natural gas

C Charcoal

D Hydrogen

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Answer: Option [D]

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