set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

Compounds

a) contain only one type of element

b) can be separated by their physical properties

c) are the same as mixtures

d) are different kinds of atoms chemically combined with each other.

Question : 2

Which one of the following is not a mixture?

a) Baking soda

b) Tootpaste

c) Toilet soap

d) Vinegar

Question : 3

A pungent smell often present near the urinals is due to

a) ammonia

b) sulphur-di-oxide

c) chlorine

d) urea

Question : 4

To weld metals together, high temperature is required. Such a high temperature is obtained by burning

a) Methane in oxygen

b) Acetylene in oxygen

c) LPG in oxygen

d) Acetylene in nitrogen

Question : 5

The main component of Gobar gas is?

a) Ethylene

b) Chlorine

c) Hydrogen

d) Methene

Question : 6

Which of the following is a colloid ?

a) Silicic acid

b) Urea solution

c) Sugar solution

d) NaCl solution