Multiple choice

For which following properties Li has higher value than Na?

  1. Hydration enthalpy
  2. Thermal stability of hydride
  3. Stability of carbonate
  4. Basic character of hydroxide

  1. 1 and 2

  2. 1 and 3

  3. 1 and 4

  4. 2 and 3

  5. 3 and 4
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A Correct answer
Explanation

The hydration enthalpies of alkali metal ions decrease with increase in ionic sizes. The correct order of hydration enthalpies of alkali metal ions is Li+> Na+ > K+ > Rb+ > Cs+. The thermal stability of alkali metal hydrides decreases from LiH to CsH.

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