set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

A non metal that catches fire at room temperature is-

a) Sulphur

b) Phosphorus

c) Sodium

d) Fluorine

Question : 2

Which of the following non-metals has shining lustrous surfaces?

a) Graphite and iodine

b) Iodine and phosphorus

c) Graphite and phosphorus

d) Phosphorus and chlorine

Question : 3

The chemical formula of the Plaster of Paris is

a) $CaSO_4 ·½H_2O$

b) $CaSO_4 ·H_2O$

c) $CaSO_4$

d) $CaSO_4 ·2H_2O$

Question : 4

What are the elements which are liquids at room temperature and standard pressure?

1. Helium
2. Mercury
3. Chlorine
4. Bromine

a) 2, 3 and 4

b) 2 and 4

c) 2 and 3

d) 1 and 3

Question : 5

Chemically rust is

a) ferric oxide only

b) hydrated ferric oxide only

c) hydrated ferrous oxide only

d) ferrous oxide only

Question : 6

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

a) Copper

b) Magnesium

c) Zinc

d) Iron