Which of the following properties of water is incorrect regarding its non-usage as a barometric liquid?

1. It neither wets nor sticks to the glass tube
2. The vapour pressure of water is high
3. The surface of water cannot be easily seen while taking observations
4. The density of water is low.

If the barometric height gradually falls, it indicates :

1. a possibility of a storm or cyclone
2. extremely dry weather
3. weather will remain the same.
4. a possibility of rain.

Altimeter is used in an aircraft to measure :

1. atmospheric pressure
2. altitudes
3. speed
4. distance travelled

Assertion (A) : As we move to higher altitudes, at times nose bleeding occurs.

Reason (R) : The reason for nose bleeding is excess of atmospheric pressure over the blood pressure.

1. both A and R are true and R is the correct explanation of A
2. both A and R are true and R is not the correct explanation of A
3. assertion is false but reason is true
4. assertion is true but reason is false