set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

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)

Question : 2

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 : 3

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 : 4

The main constituent of vinegar is

a) Citric acid

b) Acetic acid

c) Ascorbic acid

d) Tartaric acid

Question : 5

Which one of the following will result in the formation of a mixture?

a) Adding sodium metal to water

b) Breaking of ice cubes into small pieces

c) Crushing of a marble tile into small particles

d) Adding milk in water

Question : 6

Which one is a sublime substance?

a) Iodine

b) Table salt

c) Sugar

d) Potassium Iodide