Chemistry - Questions and Answers, General Study (GK)

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391.

Which one among the following polymers is used to make personal armour such as combat helmets, ballistic face masks, and ballistic vests?

(a)Teflon

(b)PVC

(c)Bakelite

(d)Kevlar

Comment

Answer is: DNA

392.

Which one of the following is a distilled fuel that is almost pure carbon?

(a)Coal

(b)Coaltar

(c)Coke

(d)Lignite

Comment

Answer is: CNA

393.

The polymeric fibre used as a substitute for wool in making synthetic blankets, sweater, etc., is

(a)Nylon

(b)Teflon

(c)Bakelite

(d)Orlon

Comment

Answer is: DNA

394.

Carbonated beverages such as soft drinks and soda water contains mainly

(a)Carbon dioxide

(b)Calcium carbonate

(c)Calcium hydroxide

(d)Potassium carbonate

Comment

Answer is: ANA

395.

Which one of the following is used as a mordant in dyeing and tanning industry?

(a)Magnesium oxide

(b)Magnesium chloride

(c)Magnesium sulphate

(d)Magnesium carbonate

Comment

Answer is: CNA

396.

Vermicompost is a/an

(a)Inorganic fertilizer

(b)Toxic substance

(c)Synthetic fertilizer

(d)Organic bio-fertilizer

Comment

Answer is: DNA

397.

Which one of the following is a thermo setting polymer?

(a)Polyethene

(b)Bakelite

(c)Terylene

(d)Polystyrene

Comment

Answer is: BNA

398.

Why cannot hard water be used in boilers?

(a)The boiling point of hard water is high

(b)The conductivity of hard water is less

(c)Hard water causes scales in boilers

(d)Hard water reacts with metals used in making boilers

Comment

Answer is: CNA

399.

Tincture of iodine contains

(a)KI

(b)KIO₃

(c)HI

(d)CHI₃

Comment

Answer is: ANA

400.

Select the correct statement regarding potash alum

(a)It has 24 water molecules

(b)It swells on heating

(c)Its aqueous solution is basic

(d)It is white in colour

Comment

Answer is: DNA

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Chemistry - Questions and AnswersPage 40

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