1

### AIPMT 2001

The beans are cooked earlier in pressure cooker because
A
boiling point increases with increasing pressure
B
boiling point decreases with increasing pressure
C
extra pressure of pressure cooker softens the beans
D
internal energy is not lost while coocking in pressure cooker.

## Explanation

When water pressure increases in the pressure cooker, water boils at lower temperature and the beans in pressure cooker are cooked earlier.
2

### AIPMT 2000

Which of the following expressions correctly represents the relationship between the average molar kinetic energy, KE, of CO and N2 molecules at the same temperature ?
A
KECO = KEN2
B
KECO > KEN2
C
KECO < KEN2
D
cannot be predicted unless volumes of the gases are given

## Explanation

Average molar kinetic energy = ${3 \over 2}nRT$

As temperature is same hence average kinetic energy of CO and N2 will be same.