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
Lead
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
Butane
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