Chemistry - Questions and Answers, General Study (GK)

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Chemistry - Questions and AnswersPage 43

421.

Heavy water

(a)Contains more dissolved mair

(b)Contains more dissolved minerals

(c)Contains deuterium in place of hydrogen

(d)Contains organic impurities

Comment

Answer is: CNA

422.

Coloured glasses for goggles contain

(a)Ferrous oxide

(b)Lanthanide oxide

(c)Nickel oxide

(d)Ferric oxide

Comment

Answer is: BNA

423.

Refrigeration helps in food preservation by

(a)Killing the germs

(b)Reducing the rate of biochemical reactions

(c)Destroying enzyme action

(d)Sealing the food with a layer of ice

Comment

Answer is: BNA

424.

Indane gas is a mixture of

(a)Butane and hydrogen

(b)Butane and oxygen

(c)Butane and propane

(d)Methane and oxygen

Comment

Answer is: CNA

425.

"925 fine silver" means an alloy of?

(a)7.5% Ag and 92.5% Cu

(b)92.5% Ag and 7.5% Cu

(d)90% Ag and 10% Cu

Comment

Answer is: BNA

426.

Which of the following has highest knocking property?

(a)Aromatic hydrocarbons

(b)Olefins

(c)Branched chain paraffin's

(d)Straight chain paraffin's

Comment

Answer is: DNA

427.

Hinsberg's reagent is

(a)Benzene sulphonyl chloride

(b)Benzene sulphuryl chloride

(c)Benzene sulphonic acid

(d)Benzene sulphonamide

Comment

Answer is: ANA

428.

'Misch metal' is widely used in the manufacture of which of the following?

(a)Material of car break

(b)Smoke detectors

(c)Cigarette lighter

(d)Emergency light

Comment

Answer is: CNA

429.

Which one of the following compounds was responsible for the epidemic form of disease called 'Mina Mata disease'?

(a)A lead compound

(b)A mercury compound

(c)A sulphur compound

(d)A fluorine compound

Comment

Answer is: BNA

430.

What is 'Agent Orange'?

(a)An insecticide

(b)A fertilizer

(c)A weedicide

(d)A bio fertilizer

Comment

Answer is: CNA

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Chemistry - Questions and AnswersPage 43

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