Explain : \( \mathrm{Ca}, \mathrm{Ba}, \mathrm{Sr} \) are stored in paraffin but \( \mathrm{Be} ...

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Explain :
\( \mathrm{Ca}, \mathrm{Ba}, \mathrm{Sr} \) are stored in paraffin but \( \mathrm{Be} \& \mathrm{Mg} \) are not
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