Assertion(A): Vaporisation is an endothermic process.

Reason(R) : For a matter, particles of vapour have a higher kinetic energy than that in liquid state.

Both A and R are true, R is not correct explanation of A

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Both A and R are true, R is correct explanation of A

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A is true but R is false

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A is false but R is true

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Solution

The correct option is B Both A and R are true, R is correct explanation of A
During vaporisation of a liquid, heat is provided to the liquid.
This heat gets added to the particles of matter making particles of vapour more energetic than that of particles in liquid state.
Both A and R are correct and R is correct explanation of A.
So, 'a' is the correct option.

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