NEET 2008 Chemistry question
Not in JEE Main or NEET syllabus
The alkali metals form salt-like hydrides by the direct synthesis at elevated temperature. The thermal stability of these hydrides decreases in which of the following orders?
Answer: (1)
Solution
Alkali metals form ionic (saline) hydrides, . Stability depends on the lattice energy and on the polarisation of the large ion: the smaller the cation, the greater the lattice energy and the more stable the
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