TRB Polytechnic Model Question Paper for Chemistry - 3

Question: 11

The lightest element known is

(A) He

(B) Li

(C) Ar

(D) H₂

Question: 12

The valency of bicarbonate ion is

(A) 1

(B) 2

(C) 3

(D) 4

Question: 13

Which one of the following does not contain silver?

(A) Horn silver

(B) Lunar caustic

(C) German silver

(D) Ruby silver

Question: 14

The valency of sulphate ion is

(A) 1

(B) 2

(C) 3

(D) 4

Question: 15

The only metal in the liquid state is

(A) Potassium

(B) Iodine

(C) Calcium

(D) Mercury