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Question

Molecular weight of water is $$20$$ u.


A
True
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B
False
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Solution

The correct option is B False
Molecular formula of water is $$H_2O$$
Atomic weight of $$H$$ is $$1$$ u and of $$O$$ is $$16$$ u
Molecular weight of water =
$$2\times mass\ of\ H+1\times mass\ of\ O$$
$$2\times 1 + 16=18$$ u
Therefore, option $$B$$ is correct.

Chemistry

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