Question

Why is mercury preferred as a barometric liquid over water?

Answer 1

Answer:

Mercury has a very low vapor pressure when compared to that of water.

So it is more sensitive than water to the changes in the atmospheric pressure and rises more quickly to record the changes in the atmospheric pressure.

hope it helps you ❤️

Answer 2

Explanation:

mercury is dense liquid . it's density is about 13 times that of water . so , we need tube of much shorter length in a mercury barometer . with less dense liquid such as water , we would need a tube about 13 times longer