set 3 MCQ Questions & Answers Detailed Explanation

Question : 1

Arrange the following bases in increasing order of their, basic strength

1. Sodium hydroxide
2. Magnesium hydroxide.
3. Aluminium hydroxide
4. Ammonium hydroxide

a) 4 3 2 1

b) 4 2 1 3

c) 4 1 2 3

d) 1 2 3 4

Question : 2

Acids are ____________ in taste while bases are ____________ in taste.

a) sweet, sour

b) sour, salty

c) sweet, salty

d) sour, bitter

Question : 3

Neutral water with pH about 7 becomes slightly acidic when aerated. This is because

a) ultraviolet radiation dissociates water molecules and makes water acidic

b) oxygen from air is dissolved in the water which makes the water acidic

c) dirt, which get contaminated with the water during aeration makes the water acidic

d) carbon-dioxide from air is dissolved

Question : 4

Which is not a Lewis acid?

a) $BF_3$

b) $NH_3$

c) $AlCl_3$

d) $FeCl_3$

Question : 5

When the stopper of a bottle containing colourless liquid was removed, the bottle gave smell like that of vinegar. The liquid in the bottle could be

a) sodium hydroxide solution

b) acetic acid solution

c) hydrochloric acid

d) saturated sodium hydrogen carbonate solution

Question : 6

The hypo solution used in photography is an aqueous solution of

a) Sodium tetrathionate

b) Sodium sulphate

c) Sodium thiosulphate

d) Ammonium per sulphate