Factors Affecting Vapour Pressure

Q.

Can vapour pressure be greater than $1atmosphere$?

Q. Liquid M and liquid N form an ideal solution. The vapour
pressures of pure liquids M and N are 450 and 700 mmHg,
respectively, at the same temperature. Then correct statement
is:
$x_M$ = mole fraction of M in solution;
$x_N$ = mole fraction of N in solution;
$y_M$ = mole fraction of M in vapour phase;
$y_N$ = mole fraction of N in vapour phase

1. $\frac{x_M}{x_N}>\frac{y_M}{y_N}$
2. $(x_M-y_M)<(x_N-y_N)$
3. $\frac{x_M}{x_N}<\frac{y_M}{y_N}$
4. $\frac{x_M}{x_N}=\frac{y_M}{y_N}$

Q. The vapour pressure of a solvent $A$ is $0.80atm$. When a non-volatile substance $B$ is added to this solvent its vapour pressure drops to $0.6atm$, the mole fraction of $B$ in the solution is

1. 0.25
2. 0.5
3. 0.75
4. 0.9

Q. A liquid is transferred to a bigger vessel (with bigger surface area) at the same temperature. The vapour pressure of the liquid

1. increases
2. decreases
3. remains same

Q. Temperatures of liquids A, B, C, D are 25, 50, 75, 90 (${}^{0}C$) respectively. Order of their vapour pressures is:

1. A
2. B
3. C
4. D

Q.

Ashar has water at different temperatures.

(1) ${25}^{\circ }C$ (2) ${50}^{\circ }C$ (3) ${75}^{\circ }C$ (4) ${90}^{\circ }C$

He is wondering where vapour pressure of water will be highest.

Can you help him and choose the correct order of vapour pressure for him.

1. 4 > 3 > 2 > 1
2. 3 > 2 > 4 > 1
3. 1 > 2 > 3 > 4
4. 2 > 3 > 4 > 1