Chemistry - Questions and Answers, General Study (GK)

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Chemistry - Questions and AnswersPage 29

281.

Fuel used for rocket propulsion is a mixture of

(a)Hydrazine and hydrogen peroxide

(b)Hydrazine and TNT

(c)Hydroxyl amine and TNT

(d)Hydroxyl amine and hydrogen peroxide

Comment

Answer is: CNA

282.

Tincture of iodine is

(a)CHI₃ in alcohol

(b)I₂ in alcohol

(c)I₂ in KI

(d)CHI₃ in KI

Comment

Answer is: BNA

283.

Fe₃O₄ is called

(a)Haematite

(b)Magnetite

(c)Casserite

(d)Dolomite

Comment

Answer is: BNA

284.

Water softner is

(a)Borax

(b)Zeolite

(c)Both (a) and (b)

(d)None of these

Comment

Answer is: CNA

285.

Diamond is a

(a)Good conductor and soft

(b)Non-conductor and hard

(c)Non-conductor and soft

(d)Good conductor and hard

Comment

Answer is: BNA

286.

Why are noble gases so called?

(a)Due to their chemical inertness

(b)They react quickly with other compound

(c)They react only with carbon compound

(d)They can produce oxygen

Comment

Answer is: ANA

287.

Synthetic gas is a mixture of

(a)Steam and carbon monoxide

(b)Carbon monoxide and nitrogen

(c)Hydrogen and methane

(d)Hydrogen and carbon monoxide

Comment

Answer is: DNA

288.

Graphite is used in atomic piles

(a)As a lubricant

(b)As a moderator

(c)As a fuel

(d)As an insulator

Comment

Answer is: BNA

289.

When CO₂ is passed through an aqueous solution of bleaching powder, the gas evolve is

(a)Chlorine

(b)Oxygen

(c)Ozone

(d)Chlorine dioxide

Comment

Answer is: ANA

290.

Activated charcoal is employed to remove colouring matter from pure substance, it works by

(a)Bleaching

(b)Oxidation

(c)Reduction

(d)Adsorption

Comment

Answer is: DNA

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Chemistry - Questions and AnswersPage 29

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