Atomic weight of an element is $40$ and its valency is $2$ . What is its equivalent weight?

20

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40

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80

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10

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Solution

The correct option is B $20$
$E q . w t . = \frac{A t o m i c W e i g h t}{V a l e n c y}$

$= \frac{40}{2}$

$= 20$

Hence, option A is correct.

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