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

Question : 16

Removal of impurities from ore is known as -

a) calcination

b) crushing and grinding

c) concentration of ore

d) roasting

Question : 17

Which of the following non-metals sublimes on heating ?

a) Bromine

b) Fluorine

c) Chlorine

d) Iodine

Question : 18

The process to heat the ore in the presence of excess supply of air below its melting point is called

a) smelting

b) roasting

c) calcination

d) liquation

Question : 19

The metal used to built bridges is

a) platinum

b) gold

c) silver

d) iron

Question : 20 [NDA]

Which one of the following elements cannot displace hydrogen gas from a dilute acid?

a) Copper

b) Magnesium

c) Zinc

d) Iron