Acid, Base and Salt UPSC Questions

Acid, Base and Salt MCQ Questions

7.

Match the following Name of the base Found in

List I List II
a) Calcium hydroxide i.) Soap
b) Ammonium hydroxide ii.) Milk of magnesia
c) Sodium hydroxide iii.) Lime water
d) Magnesium hydroxide iv.) Window cleaner
A.

a-iv,b-iii,c-ii,d-i

B.

a-iii,b-iv,c-i,d-ii

C.

a-i,b-ii,c-iii,d-iv

D.

a-iv,b-i,c-iii,d-ii

ANSWER :

B. a-iii,b-iv,c-i,d-ii

8.
The most commonly used natural indicator is
A.
Turmeric
B.
Methyl orange
C.
China rose petals
D.
Litmus
ANSWER :
D. Litmus
9.

Statement: Litmus is extracted from lichens.
Question: When added to an acidic solution, it turns _____

A.

Red

B.

Green

C.

Blue

D.

Yellow

ANSWER :

A. Red

10.

Statement: Litmus is extracted from lichens.
Question: When added to an basic solution, it turns _____

A.

Red

B.

Green

C.

Blue

D.

Yellow

ANSWER :

C. Blue

11.
The solutions which do not change the colour of either red or blue litmus are known as _____ solutions
A.
Basic
B.
Neutral
C.
Acidic
D.
None of the above
ANSWER :
B. Neutral
12.
When the solution is basic, phenolphthalein gives a _____ colour.
A.
Blue
B.
Purple
C.
Orange
D.
Pink
ANSWER :
D. Pink