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NEET
Exam
NEET
Subject
Chemistry
Chapter
s Block Elements

NEET · Chemistry · s Block Elements

Why is lithium carbonate (Li 2 CO 3 ) less stable to heat compared...

Why is lithium carbonate (Li2CO3) less stable to heat compared to other alkali metal carbonates?

Options

  1. ALithium carbonate is inherently less stable due to its composition.
  2. BLithium carbonate is more stable to heat than other alkali metal carbonates.
  3. CLithium carbonate decomposes into Li2O and CO2 when heated due to its small size polarizing CO32- ions.
  4. DLithium carbonate does not undergo any thermal decomposition.

Correct answer

C. Lithium carbonate decomposes into Li2O and CO2 when heated due to its small size polarizing CO32- ions.

Step-by-step solution

Lithium carbonate (Li2CO3) is less stable to heat because lithium ions, being very small in size, polarize the carbonate ion (CO32-), leading to the formation of more stable lithium oxide (Li2O) and carbon dioxide (CO2) when heated.
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