metals, non metals, minerals, ores, properties, uses - Category wise Question and Answer Practice Test with Solutions

Question : 11

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

a) Gangue

b) Minerals

c) Ores

d) Salts

Question : 12

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 : 13 [NDA]

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 : 14

The metalloids include the elements

a) Germanium, Tellurium

b) Boron, Silicon

c) Arsenic, Antimony

d) All of these

Question : 15

Which of the following mineral does not contain Al ?

a) Feldspar

b) Cryolite

c) Mica

d) Fluorspar