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Question

Advantages of mercury include:

A
It is opaque therefore, apt readings can be taken.
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B
It slides easily on glass
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C
Both A and B
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D
None of these
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Solution

The correct option is C Both A and B
There are various advantages of using mercury in barometers because:
1. It has high density which means the height of the column can be a reasonable size to measure atmospheric pressure.
2. It is opaque therefore,apt readings can be taken.
3. It slides easily on glass

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