Chemistry · PYQ NEET UG 2018
हिन्दीAmong \( \mathrm{CaH}_{2}, \mathrm{BeH}_{2}, \mathrm{BaH}_{2} \), the order of ionic character is
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Correct answer · Option A
\( \mathrm{BeH}_{2}<\mathrm{CaH}_{2}<\mathrm{BaH}_{2} \)
Explanation
As we move down the group, electronegativity of alkaline earth metals decreases, leading to an increase in ionic character of hydrides. Thus \( \mathrm{BeH}_{2}<\mathrm{CaH}_{2}<\mathrm{BaH}_{2} \).