set 3 MCQ Questions & Answers Detailed Explanation

Question : 1

Bronze is an alloy of copper and

a) Nickel

b) Silver

c) Tin

d) Aluminium

Question : 2

The chemical formula of Heavy Water is

a) $H_2S$

b) $H_2CO_3$

c) $H_2O$

d) $D_2O$

Question : 3

Consider the following statements. Glass can be etched or scratched by

1. Diamond
2. Hydrofluoric Acid
3. Aquarregia
4. Conc. Sulphuric Acid

a) 2 and 4

b) 1 and 4

c) 2 and 3

d) 1 and 2

Question : 4

Check these statements.

1. Brass is an alloy of Copper and Zinc.
2. Magnetite is the main ore of Aluminium.
3. Mercurius Solubilis are that substance which mainly involves mercury.
4. Potassium Nitrate (KNO3 ) is a chemical used in photography.

a) 1, 3 and 4

b) 2 and 3

c) 1 and 2

d) 1 and 3

Question : 5

Which of the following is not in the form of crystal?

a) Graphite

b) Diamond

c) Quartz

d) Sulphur

Question : 6

Which gas is known as ‘noble gas’?

a) Oxygen

b) Helium

c) Hydrogen

d) Carbon dioxide