TRB Old Question Papers for Chemistry - 3

Question: 11

In which type of rocks are metals like Gold and Copper mostly found?

(A) Old igneous

(B) Old sedimentary

(C) Old metamorphic

(D) New metamorphic

Ans; A

Old igneous

Question: 12

The chemical name of limestone is

(A) Calcium carbonate

(B) Calcium oxide

(C) Calcium chloride

(D) Calcium hydroxide

Ans: A

Calcium carbonate

Question: 13

Metals can be beaten into thin sheets. This property is called

(A) Conductivity

(B) Malleability

(C) Ductility

(D) Luster

Ans: B

Malleability

Question: 14

A mixture of water and alcohol can be separated by

(A) Filtration

(B) Evaporation

(C) Distillation

(D) Decantation

Ans: C

Distillation

Question: 15

The process of losing water of crystallization from a hydrated salt when exposed to air is called as

(A) Hydration

(B) Dehydration

(C) Efflorescence

(D) Hardening

Ans: C

Efflorescence

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