What is the advantage of negligible vapour pressure of mercury.

It does not affect the barometric height

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It gives the correct reading

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It is easily seen while taking the reading

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All the above

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Solution

The correct option is B It gives the correct reading
The surface of mercury is shiny and opaque. Therefore it is easily seen while taking the observation. The vapor pressure of mercury is negligible. Hence the barometric height is not affected. The mercury neither sticks nor wets the glass tube.

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What is the advantage of negligible vapour pressure of mercury.

The correct option is B It gives the correct readingThe surface of mercury is shiny and opaque. Therefore it is easily seen while taking the observation. The vapor pressure of mercury is negligible. Hence the barometric height is not affected. The mercury neither sticks nor wets the glass tube.

The correct option is B It gives the correct reading
The surface of mercury is shiny and opaque. Therefore it is easily seen while taking the observation. The vapor pressure of mercury is negligible. Hence the barometric height is not affected. The mercury neither sticks nor wets the glass tube.