Question

Why is not water used as a barometric liquid. Give two reasons

Answer 1

Disadvantages of using water as a barometric liquid is as follows :-

1. Disadvantages of using water as a barometric liquid is as follows :-The density of water is low (= 10³ kg/m³), so nearly 10.4 m height of water column is needed to balance the normal atmospheric pressure. but it is highly inconvenient to take a tube of height 10.4 m for a barometer.
2. The vapour pressure of water is high, so it's vapours in the vacuum space will make the reading inaccurate.
3. Water sticks with the glass tube and wets it, so the reading becomes inaccurate.
4. Water is transparent, so its surface is not easily seen while taking the observation.

Water is transparent, so its surface is not easily seen while taking the observation.xxxxxxxxxxxxxxxxxxxxxx

Answer 2

$\huge\pink{\mathfrak{answer}}$

Water is not a suitable barometric liquid because: (i) The vapour pressure of water is high, so its vapours in the vacuum space will make the reading inaccurate. (ii) Water sticks with the glass tube and wets it, so the reading becomes inaccurate.