set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Which one of the following petroleum refinary products has the lowest boiling point?

a) Gasoline

b) Kerosene

c) Diesel

d) Lubricating oil

Question : 2

The chemical technique applied to find out age of fossils is knows as

a) Photosynthesis

b) Carbon dating

c) Nuclear fusion

d) Fermentation

Question : 3

The atomic weights are expressed in terms of atomic mass unit. Which one of the following is used as a standard?

a) $^16O_8$

b) $^1H_1$

c) $^12C_6$

d) $^35Cl_17$

Question : 4

Which of the following processes is known as fusion?

a) change of liquid to vapour

b) change of liquid to solid

c) change of solid to liquid

d) change of gaseous state to solid state

Question : 5

Cloud or fog is an example of colloidal system of

a) solid dispersed in gas

b) gas dispersed in gas

c) liquid dispersed in gas

d) solid dispersed in liquid

Question : 6

Aqua-regia used by alchemists to separate silver and gold is a mixture of

a) nitric acid (concentrated) and sulphuric acid (concentrated)

b) hydrochloric acid (concentrated) and nitric acid (concentrated)

c) hydrochloric acid (concentrated) and sulphuric acid (concentrated)

d) hydrochloric acid (dilute) and sulphuric acid (dilute)