Question

which of the following is a surface phenomena ?
(a) Evaporation
(b) boiling
(c) diffusion
(d) both (a) and (b)

which one among these is not a state of matter ?
(1) plasma (2) BEC
(3) solid (4) vapour
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Answer 1

1. (a)

2. (2)

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Answer 2

Answer:

1 both a and b

Explanation:

both are surface phenomena

2 vapour is not considered as state of matter because it is water when condensed and gas when boiled