Q. 46

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

Assertion (A): The temperature at which vapour pressure of a liquid is equal to the external pressure is called boiling temperature.

Reason (R): At high altitude atmospheric pressure is high.

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

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

(iii) A is true but R is false.

(iv)A is false but R is true.

Answer :

(iii)

The Boiling point can be defined as “the temperature at which vapour pressure of a liquid is equal to the external pressure “.


Hence, assertion is true.


Now, the reason, at high altitude atmospheric pressure is high, is found to be false because the pressure decreases as the altitude increases


Hence, (iii) option is correct.


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