1. Tardigrade
  2. Question
  3. Chemistry
  4. 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?

Q. 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?

 3089  209 AIPMTAIPMT 2008The s-Block Elements Report Error

Solution:

As the size of the alkali metal cation increases, thermal stability of their hydrides decreases. Hence, the correct order of thermal stability of alkali metal hydrides is
LiH > NaH > KH > RbH > CsH