set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

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 : 2

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 : 3

Which one of the following metals is liquid at room temperature?

a) Mercury

b) Nickel

c) Lead

d) Tin

Question : 4

A non metal that catches fire at room temperature is-

a) Sulphur

b) Phosphorus

c) Sodium

d) Fluorine

Question : 5

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 : 6

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