In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below in each question.

Assertion (A) At critical temperature liquid passes into gaseous state imperceptibly and continuously.

Reason (R) The density of liquid and gaseous phase is equal to crictical temperature.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not the correct explanation of A

(c) A is true but R is false

(d) A is false but R is true

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Solution

Both assertion and reason are true and the reason is the correct explanation of assertion. At the critical temperature, the density of the liquid and gaseous phase becomes equal. Due to which liquid passes into gaseous imperceptibly and continuously.

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