Chemistry Chapter 4 book 1

1.     Basic reason for the evaporation of liquids may be

a)     Weak forces

b)    Movement and collisions

c)     Surface area

d)    Every liquid do not evaporate

2.     We can change boiling point of any liquid by changing eternal pressure because

a)     Boiling point is related to the external pressure

b)    Boiling point is related to attractive forces

c)     Related to vapor pressure

d)    Given statement is wrong

e)     Both a and b are correct

3.     A pressure cooker reduces the cooking time due to

a)     Boiling point of water increases

b)    Uniform distribution of heat

c)     Vapor pressure of liquid decreases

d)    Some unknown reasons

1.b

2.e

3.c