Which of the following is not a reason why mercury is preferred as a barometric liquid?

Mercury has high density

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Mercury does not wet the glass

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Mercury is opaque and shiny

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Mercury is poisonous

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Solution

The correct option is D Mercury is poisonous
1) It has $13.5$ times higher density than water
2) It doesn't stick to the glass walls of tube like water does.
3) It is opaque and shiny

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Give two reasons why water is not a suitable barometric liquid.

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