set 3 MCQ Questions & Answers Detailed Explanation

Question : 1

‘Alum’ is an example of –

a) double salt

b) acids

c) single salt

d) none of these

Question : 2

Bleaching powder is soluble in cold water giving a milky solution due to –

a) lime present in it

b) calcium carbonate formation

c) available chlorine

d) the absorption of carbon dioxide from atmosphere

Question : 3

Plaster of paris is obtained –

a) by heating gypsum to a very high temperature

b) by adding water to calcium sulphate

c) by adding sulphuric acid to calcium hydroxide

d) by heating gypsum to 373 K.

Question : 4

Match List I with List II and select the correct answer using the codes given below the lists:

a) A-3; B-4; C-1; D-2

b) A-3; B-4; C-2; D-1

c) A-4; B-3; C-2; D-1

d) A-4; B-3; C-1; D-2

Question : 5

Which of the following statements regarding oxidation and reduction are correct?

1. In oxidation, loss of electron takes place whereas in reduction, gain of electron takes place.
2. In oxidation, gain of electron takes place whereas in reduction, loss of electron takes place.
3. Oxidizing agent decreases the oxidation number but reducing agent increases the oxidation number.
4. Oxidizing agent increases the oxidation number but reducing agent reduces the oxidation number.

a) 2 and 3

b) 1 and 3

c) 2 and 4

d) 1 and 4

Question : 6

Which of the following acid do not contain Oxygen?

a) Sulphuric Acid

b) Hydrochloric Acid

c) Nitric Acid

d) All of the above