Which of the following element is most electropositive?

H

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M g

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C a

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S i

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Solution

The correct option is B $C a$
Alkali or alkaline earth metals present on the left side are highly electropositive. $C a$ and $M g$ both belong to the same alkaline earth metal group. The electropositive character increases down the group with the increase in atomic size so $C a$ is more electropositive.

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