Question

observe the evaporation process of petrol, kerosene, water, glycerin, camphor under conditions - inside the room, outside shadow, exposing to sunlight and give a report.

Answer 1

There are several factors affecting to evaporation
1. An increase of surface area
2. An increase of temperature
3. A decrease in humidity
4. An increase in wind speed
5. The nature of the liquid
6. Vapor pressure: if pressure is applied on the surface of a liquid, evaporation is hindered; consider the case of a pressure cooker

so you have to consider all these things.
when all the other factors are constant only the nature of the liquid is affected.
When considering that, these things can be taken as the nature of the liquid

1. specific heat
water has high specific heat due to the high proportion of H atoms

2. The van der Waals forces between the molecules
greater the forces lower the rate of evaporation

3. The boiling point
higher the boiling point lower the rate of evaporation

Answer 2

Answer:

Correct option is B)

A substance that has a lower boiling point will evaporate first. Boiling points of given species are:-

1) Boiling point of water = 100

o

C

2) Boiling point of alcohol = 79

o

C (here ethanol is considered as alcohol)

3) Boiling point of petrol = 95

o

C

4) boiling point of kerosene = 150

O

C−300

o

C

Hence, the correct answer is B.