PG TRB Chemistry Previous Year Question Papers with Answers Pdf - 5

Question: 21

The valency of calcium is

(A) 1

(B) 2

(C) 3

(D) 4

Question: 22

What type of bond is present in Hcl molecule?

(A) Ionic bond

(B) Polar covalent bond

(C) Covalent bond

(D) Co-ordinate bond

Question: 23

Carborundum is a compound of

(A) Ca

(B) Ge

(C) Si

(D) Sg

Question: 24

The atomicity of sulphur is

(A) 2

(B) 4

(C) 6

(D) 8

Question: 25

Proton is a

(A) Sub atomic particle having a unit positive charge and unit mass.

(B) Sub atomic particle having no charge and unit mass.

(C) Sub atomic particle having a unit positive charge and no mass.

(D) Sub atomic particle having a unit negative charge and unit mass.