set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Bases turn red litmus blue and acids turn blue litmus red. A student tested a liquid with a red litmus paper and it stayed red with no change. This shows that the liquid

a) is not a base

b) must be pure water

c) must be an acid

d) is neither a base nor an acid

Question : 2

The concentration of hydrochloric acid in a given solution is 10_–8 M. What is the value of pH for this solution ?

a) < 7

b) 7

c) > 7 but not 14

d) 14

Question : 3

Which of the following compounds is basic in nature ?

a) CaCl₂ .6H₂O

b) NaCl

c) Ca(OH)₂

d) CuSO₄ .5H₂O

Question : 4

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 : 5

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 : 6

With reference to ionic compounds, consider the following statements.

1. Ionic compounds are insoluble in alcohol.
2. Ionic compounds in the solid state are a good conductor of electricity.

a) Only 2

b) Both 1 and 2

c) Only 1

d) Neither 1 nor 2