Why is mercury perferred as a barometric substance over water?

Why is mercury used in a barometer ?

Why is mercury taken in a barometer?

Why is mercury used as a barometric liquid? Give three reasons.

Why is mercury used in thermometers ?

Why mercury is used in barometer?

Give reasons : Why is mercury preferred over water in making thermometers even though both of them have similar coefficient of volume expansion ?

A liquid whose density is twice the density of mercury is used as a barometric liquid. Then one atmosphere pressure equals __________ cm of the liquid pressure.