set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Food cans are coated with tin and not with zinc because

a) zinc is more reactive than tin

b) zinc has a higher melting point than tin

c) zinc is costlier than tin

d) zinc is less reactive than tin

Question : 2

While tinning of brass utensils, the ammonium chloride powder used to clean the hot utensil produces fumes of

a) hydrochloric acid

b) carbon monoxide

c) ammonia

d) ammonia and hydrochloric acid

Question : 3

Which of the following is the most common element in the Universe?

a) Hydrogen

b) Nitrogen

c) Oxygen

d) Carbon

Question : 4

What is the usual property of oxides of Group III and IV?

a) Basic and acidic

b) Acidic

c) Basic

d) Neutral

Question : 5

Match List-I with List-II :

a) 1 2 3 4

b) 2 1 3 4

c) 1 2 4 3

d) 2 1 4 3

Question : 6

In the manufacture of lead glass:

1. Oxide of lead is added to ordinary glass
2. Oxide of lead increases the density of glass
3. Oxide of lead increases the refractive index of glass
4. Oxide of lead decreases the refractive index of glass

a) 1, 3 and 4

b) 2, 3 and 4

c) 1, 2 and 4

d) 1, 2 and 3