Question

# A block of iron sinks in water, but floats in mercury, this is because:

A

Density of water > Density of mercury

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B

Density of water = Density of mercury

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C

Density of water < Density of mercury

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D

Can’t be determined

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Solution

## The correct option is C Density of water < Density of mercury The sinking or floating of a body in a liquid is due to the difference in their densities. If the density of the body is greater than the liquid, then it sinks and vice-versa. Density of water = 1 g/cc Density of iron = 7.86 g/cc Density of mercury = 13.56 g/cc So, here the density of mercury is greater than water.

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