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1

AIPMT 2001

MCQ (Single Correct Answer)
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

MCQ (Single Correct Answer)
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.

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