Question

(d) It is present in atmosphere.
12. Which of the following is most suitable for summer?
(a) Cotton
(b) Nylon.
(C) Polyester.
(d) Silk.
13. Which of the following does not affect rate of evaporation?
(a) Wind speed.
(b) Surface area
(c) Temperature.
(d) Insoluble heavy impurities
14. Kinetic energy of molecules is directly proportional to
(a) Temperature.
(b) Pressure
(c) Both (a) and (b).
(d) Atmospheric pressure
15. A few substances are arranged in the increasing order of 'forces of attraction between
their particles. Which one of the following represents a correct arrangement?
(a) Water, air, wind
(b)Air, sugar, oil
(c)Oxygen, water, sugar
(d)Salt, juice, air​

Answer 1

Answer:

12)(C) Polyester.

13)(b) Surface area

14)(a) Temperature.

15)(c)Oxygen, water, sugar

Answer 2

Answer:

12.a

13.d

14.a

15.c