Among the following elements, the element forming electron deficient hydride is : (a) \( \mathrm...

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Among the following elements, the element forming electron deficient hydride is :
(a) \( \mathrm{Cs} \)
(b) \( \mathrm{Ca} \)
(c) \( \mathrm{B} \)
(d) \( \mathrm{Mg} \)
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