alloys, carbon & its various forms, hydrogen & compounds, sulphur, nitrogen, halogen & inert gases - Category wise Question and Answer Practice Test with Solutions

Question : 26 [MPPCS (Pre) 1996]

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

a) Graphite

b) Diamond

c) Quartz

d) Sulphur

Question : 27 [UP UDA/LDA (Pre) 2001]

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 : 28 [PSC (Pre) 2016]

According to weight, the percentage of hydrogen in water ($H_2O$), is

a) 11.11%

b) 88.89%

c) 44.45%

d) 5.55%

Question : 29 [UPPCS (Mains) 2016]

Bronze is an alloy of copper and

a) Nickel

b) Silver

c) Tin

d) Aluminium

Question : 30 [PCS (Pre) 2003]

The chemical formula of Heavy Water is

a) $H_2S$

b) $H_2CO_3$

c) $H_2O$

d) $D_2O$