Mercury is a better barometric fluid than water because I. It needs no colouring II. Its density is many times greater than that of water III. It does not wetglass IV. It has a high vapour pressure V. It has a-high boiling point. Which of the above statements are true?

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Question

Mercury is a better barometric fluid than water because I. It needs no colouring II. Its density is many times greater than that of water III. It does not wetglass IV. It has a high vapour pressure V. It has a-high boiling point. Which of the above statements are true?

Accepted Answer

Answer: B.  The advantages of use of mercury in a barometer are :its density is very high.it has low vapor pressure.its rate of evaporation is not very high.it neither wets nor sticks to glass.its surface is shining and opaque.

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