2. Acid , bases and salts. Term 1

Acid, Bases and salts Paper code 086

syllabus

Their defination in terms of furnishing ions. General propetties, examples and uses, concept of pH scale, importance of pH in everyday life. preperation and uses of Sodium Hydroxide, Bleaching powder, Baking soda, Washing soda and Plaser of Paris.

mcq acid bases and salts chapter 2

1 What happens when a solution of an acid is mixed with a solution of base in a test tube?
(i) Temperatue of solution decreases.

(ii)Temperatue of solution increases.

(iii) temperatue of solution remains same.

(iv) salt formation takes place.

A) (i) and (iv)

B) (i) and (iii)

C) (ii) only

D) (ii) and (iv)

correct option D

2. When hydrogen gas is prepared on a humid day, the gas usually passed thrugh the guard tube containing calcium chloride . the role of calcium chloride taken in the guard tube is to

a) absorb the evolved gas.

b) moisten the gas.

c) absorb moisture from gas

d) absorb Cl‾ ions from evolved gas.

correct option C

3.which one of the following salts does not conatin water of crystallisation?

a) Blue vitriol

b) Baking soda.

c) Washing soda

d) Gypsum

Correct option (b)

4.In terms of acidic strength , which one of the follwoing is in the correct increasing order ?