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

Question : 16 [IAS (Pre) 2008]

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 : 17 [PCS (Pre) 2007]

The chemical structure of the pearl is

a) Calcium Carbonate & Magnesium Carbonate

b) Calcium Chloride

c) Calcium Carbonate

d) Calcium Sulphate

Question : 18 [NDA]

Oxygen and ozone are

a) isomers

b) isotopes

c) allotropes

d) isobars

Question : 19

Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?

1. Good thermal conductivity
2. Good electrical conductivity
3. Ductility
4. High melting point

a) (ii) and (iii)

b) (i) and (ii)

c) (i) and (iii)

d) (i) and (iv)

Question : 20

Metals like Gold, Platinum which do not easily react are called

a) noble metals

b) active metals

c) dull metals

d) bright metals