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

Question : 26 [UPPCS (Pre) 2007]

Sodium Vapour Lamp is usually used as street light, because

a) Light from this is monochromatic and will not split through water droplets

b) It is pleasing to the eyes

c) These are cheap

d) It is brightly illuminating

Question : 27 [UP (Spl)(Pre) 2004]

Doctors, Artists and Sculptors use Calcium Sulphate which is popularly known as

a) Limestone

b) Bleaching powder

c) Quick lime

d) Plaster of Paris

Question : 28

The best mealleable metal is –

a) gold

b) aluminium

c) silver

d) lead

Question : 29 [NDA]

Which are the most abundant elements in the universe ?

a) Hydrogen and Oxygen

b) Hydrogen and Helium

c) Oxygen and Nitrogen

d) Carbon and Nitrogen

Question : 30 [IAS (Pre) 2008]

What are Rubies and Sapphires chemically known as?

a) Aluminium Oxide

b) Lead Tetroxide

c) Silicon Dioxide

d) Boron Nitride