set 3 MCQ Questions & Answers Detailed Explanation

Question : 1

Which of the following mineral does not contain Al ?

a) Feldspar

b) Cryolite

c) Mica

d) Fluorspar

Question : 2

Which one of the following pairs of metals constitutes the lightest metal and heaviest metal, respectively?

a) Lithium and Osmium

b) Aluminium and Osmium

c) Lithium and Mercury

d) Aluminium and Mercury

Question : 3

The chemical structure of the pearl is

a) Calcium Carbonate & Magnesium Carbonate

b) Calcium Chloride

c) Calcium Carbonate

d) Calcium Sulphate

Question : 4

Why is nitrogen molecule chemically less active?

a) It has high electronegativity

b) It has high dissociation energy

c) It has small atomic radius

d) It has stable electronic configuration

Question : 5

Consider the following statements: Nitrogen is an essential constituent of

1. Soils
2. Animals
3. Plants

a) (i) and (ii) only

b) (iii) only

c) (i) and (iii) only

d) (i), (ii) and (iii)

Question : 6

Naturally occuring substances from which a metal can be profitably (or economically) extracted are called?

a) Gangue

b) Minerals

c) Ores

d) Salts