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.

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. (A) If both assertion and reason are true and reason is the correct explanation of assertion (B) If both assertion and reason are true but reason is not the correct explanation of assertion (C) If assertion is true but reason is false (D) If both assertion and reason are false

Tardigrade Admin · Accepted Answer

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

C O_{2}

. Other alkali metal carbonates do not decompose.

L i_{2} C O_{3} Δ L i_{2} O + C O_{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

L i

-

O

bond. It leads to the formation of more stable

L i_{2} O

and

C O_{2}

.

Q. 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 Li2​O and CO2​.

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false

If both assertion and reason are false

Q. Assertion : The carbonate of lithium decomposes easily on heating to form lithium oxide and $C O_{2}$ .
Reason : Lithium being very small in size polarises large carbonate ion leading to the formation of more stable $L i_{2} O$ and $C O_{2}$ .