Question

Assertion: The carbonate of lithium decomposes easily on heating to form lithium oxide
and CO2
Reason: Lithium being very small in size polarises large carbonate ion leading to
the formation of more stable Li2O and CO2​

Answer 1

Answer:

The carbonate of lithium decomposes easily on heating to form lithium oxide and CO

2

. Other alkali metal carbonates do not decompose.

Li

2

CO

3

Δ

Li

2

O+CO

2

↑

Lithium being very small in size polarises large carbonate ion. It distorts the electron cloud on the nearby oxygen atom of large carbonate ion. It weakens C−O bond and strengthens Li−O bond. It leads to the formation of more stable Li

2

O and CO

2

.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

Answer 2

Answer:

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