TRB Chemistry Question Bank - 5

Question: 21

In the Ostwald’s process for manufacture of HNO₃ used is

(A) Fe

(B) Na

(C) Mo

(D) Pt

Question: 22

The property due to which metals can be drawn into thin wires is called

(A) Conductivity

(B) Malleability

(C) Ductility

(D) Luster

Question: 23

In the atmosphere 21% of the air is

(A) Argon

(B) Carbon dioxide

(C) Nitrogen

(D) Oxygen

Question: 24

Which of the following enzyme is used to convert sucrose into glucose and fructose?

(A) Maltase

(B) Diastage

(C) Zymase

(D) Invertase

Question: 25

All living things contain

(A) Sodium

(B) Carbon

(C) Potassium

(D) Nitrogen