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NEET Medium

Among CaH2\text{CaH}_2, BeH2\text{BeH}_2, BaH2\text{BaH}_2, the order of ionic character is

1

BeH2<BaH2<CaH2\text{BeH}_2 < \text{BaH}_2 < \text{CaH}_2

2

CaH2<BeH2<BaH2\text{CaH}_2 < \text{BeH}_2 < \text{BaH}_2

3

BeH2<CaH2<BaH2\text{BeH}_2 < \text{CaH}_2 < \text{BaH}_2

4

BaH2<BeH2<CaH2\text{BaH}_2 < \text{BeH}_2 < \text{CaH}_2

Step-by-Step Solution

For 2nd group hydrides, on moving down the group metallic character of metals increases so ionic character of metal hydride increases. Hence, the order is BeH2<CaH2<BaH2\text{BeH}_2 < \text{CaH}_2 < \text{BaH}_2.

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