Polytechnic TRB Chemistry Model Question Paper with Answer Keys - 1

Question: 1

Which one among the following is used as a moderator in nuclear reactors?

(A) Ozone

(B) Heavy hydrogen

(C) Heavy water

(D) Hydrogen peroxide

Ans: C

Heavy water

Question: 2

Elements can be broadly classified into

(A) Metals and non metals

(B) Metals and alloys

(C) Non metals and alloys

(D) Liquid elements and solid elements

Ans: A

Metals and non metals

Question: 3

Bleaching powder is prepared by passing chlorine through

(A) Quicklime

(B) Dry slaked lime

(C) Milk of lime

(D) Limestone

Ans: B

Dry slaked lime

Question: 4

Which is used in storage batteries?

(A) Copper

(B) Lead

(C) Zinc

(D) Tin

Ans: B


Question: 5

Petroleum gas is a mixture of ethane, propane and butane. What is its major constituents?

(A) Ethane

(B) Propane

(C) Butane

(D) All three are present in equal proportions

Ans: C


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