Question

The pressure at Chennai is more than the
pressure at the hill station Ooty. Which of these
sentences could explain why this is so? (More
than one option could be correct.)
a. Hot air exerts less pressure than cold air.
b. Dry air is lighter than air laden with moisture
c. Pressure decreases with increase in height.
d. None of the above.
The sub-tropical high pressure belt is caused by:
a. descending cold air​

Answer 1

Answer:

Greater activity of the heated molecules increases the spacing between neighboring molecules and thus reduces air density. The decreasing air density then lowers the pressure exerted by the air. Warm air is thus lighter (less dense) than cold air and consequently exerts less pressure.