Question

A, B, C and D are volatile liquids.
The order of volatility is
A > C > B > D
Now, at a particular temperature:

• A. Vapour pressure of A >Vapour Pressure of D
• B. Vapour pressure of C >Vapour pressure of B
• C. Vapour pressure of B <Vapour pressure of D
• D. Vapour pressure of A >Vapour pressure of B

Answer 1

Answer: (A), (B), (D)

The correct options are
A Vapour pressure of A >Vapour Pressure of D
B Vapour pressure of C >Vapour pressure of B
D Vapour pressure of A >Vapour pressure of B

First thing which will come in our mind will be what is volatility?

Volatility is the tendency of a substance to vaporize.

Now, how is it related with vapour pressure?

Volatility is directly related to a liquid's vapor pressure.

More volatile liquids have higher vapour pressure.

At a given temperature, a substance with higher vapour pressure vaporizes more readily than a substance with a lower vapour pressure.

Now, volatility order is: A > C > B > D

So, order of vapour pressure will be: A > C > B > D