Most of the metals such as………are found in combined state in nature.
a) iron
b) sodium
c) copper
d) all of these
Metals that are found in combined state in nature is called………….
a) salt
b) minerals
c) nutrients
d) ore
As aggregate of minerals and other impurities is known as…………
a) waste material
a) salt
c) mineral
d) ore
The naturally occurring metallic compounds are called………….
a) mineral
b) nutrient
c) both a & b
d) none of these
A naturally occurring solid material from which a …………can be extracted profitably is called an ore.
a) valuable mineral
b) metal
c) both a & b
d) none of these
The earthy materials such as ………and other impurities attached with ores are called gangue.
a) sand
b) rock
c) clay
d) all of these
