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Beryllium is placed above magnesium in the second group. Beryllium dust, therefore when added to ${MgCl}_{2}$ solution will

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Have no effect

Precipitate $Mg$ metal

Precipitate $MgO$

Lead to dissolution of $Be$ metal

answer is A.

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Detailed Solution

No doubt $Be$ is placed above $Mg$ in the second group of periodic table but, it is below $Mg$ in electrochemical series.
So, Be is less reactive than Mg and there is no effect in the solution.

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