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  • Which among the following alkaline earth metal does not form hydride on reaction with ?</

Which among the following alkaline earth metal does not form hydride on reaction with \mathrm{H}_{2} ?

Option: 1

\mathrm{Be}


Option: 2

\mathrm{Ca}


Option: 3

\mathrm{Mg}


Option: 4

\mathrm{Ba}


Answers (1)

best_answer

All alkaline earth metals form hydrides on reacting with \mathrm{H}_{2} except Beryllium. This is due to the less electropositive character of Beryllium as compared to other alkali earth metals.

As we move down the group, the electropositive character increases hence other alkaline earth metals forms hydride.

\mathrm{M} \quad+\quad \mathrm{H}_{2} \rightarrow \mathrm{MH}_{2}

Where, \mathrm{M}=\mathrm{Mg}$, $\mathrm{Ca}, \mathrm{Sr}, \mathrm{Ba}

Posted by

Sayak

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