set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Assertion (A):
To dilute sulphuric acid, acid is added to water and not water to acid.
Reason (R):
Specific heat of water is very high.

a) Both (A) and (R) are true, but (R) is not the correct explanation of (A)

b) (A) is true, but (R) is false

c) Both (A) and (R) are true and (R) is the correct explanation of (A)

d) (A) is false, but (R) is true

Question : 2

Match Column-I with Column-II:

a) A – P; B – R; C – S; D – Q

b) A – R; B – P; C – S; D – Q

c) A – Q; B – P; C – S; D – R

d) A – R; B – P; C – Q; D – S

Question : 3

Removal of impurities from ore is known as –

a) calcination

b) crushing and grinding

c) concentration of ore

d) roasting

Question : 4

Plaster of paris is obtained –

a) by adding sulphuric acid to calcium hydroxide

b) by heating gypsum to a very high temperature

c) by adding water to calcium sulphate

d) by heating gypsum to 373 K.

Question : 5

Which of the following is considered a mineral acid ?

a) Lactic acid

b) Citric acid

c) Oxalic acid

d) Phosphoric acid

Question : 6

Which method is employed for obtaining a pure metal?

a) Magnetic separation

b) Froth floatation

c) Electrolytic refining

d) Gravity separation