JEE Main Chemistry question
Not in JEE Main or NEET syllabus
The alkali metals form salt-like hydrides by the direct synthesis at elevated temperatures. The thermal stability of these hydrides decreases in which of the following orders?
Answer: (C)
Solution
Thermal stability of the ionic (saline) alkali metal hydrides decreases down the group, since the smaller, more strongly binding cation stabilises the hydride ion lattice more effectively: is the most stable, and
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