Question

please answer only if you know don't give rubbish answers or else i will report
(1)
(a) differentiate between boiling and vaporization.
(b) discuss four factors which affect evaporation.
(2)
(a) why do we wear cotton clothes in summer with light color's? (
b) why is water liquid at room temperature?
(c) give one example each to explain characteristics of particles.
(3) (a) why do we feel cold when alcohol is kept on our palm? (b) define boiling point and melting point. (c) why is freezing point of a common salt mixed with ice is less than 0°c? (d) why does sea water boil above 100°c?
(4) give reasons for the following: (a) camphor disappears when kept for a few days. (b) wet clothes do not dry easily on rainy days. (c) we sweat more on humid day.

Answer 1

Answer:

1.a. rapid formation and breaking of bubbles in the bulk of a liquid being heated is called boiling.

vaporisation:

The process in which a liquid on heating changes into vapour is called vaporisation

1.b. four factors which effect the evaporation are:

1. Temperature

2.Surface area

3. Humidity of surroundings

4.Nature of liquids

ans2. because cotton is good absorber of water so,it absorbs the sweat and exposes it to the atmosphere. .THis speeds up evaporation of the sweat and makes us comfortable