set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

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 : 2

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 : 3

Select the property that is associated with non-metals.

a) Poor conductor of electricity

b) Low density

c) Low melting point

d) All of the above

Question : 4

Which one of the following statements is correct?

a) Calcium carbonate is an ingredient of toothpaste

b) Bordeaux mixture consists of sodium sulphate and lime

c) Liquid sodium is employed as a coolant in nuclear reactors

d) Zinc amalgams are used as a dental filling

Question : 5

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 : 6

Chemically rust is

a) ferric oxide only

b) hydrated ferric oxide only

c) hydrated ferrous oxide only

d) ferrous oxide only