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Question
Assertion (A): The carbonate of lithium decomposes easily on heating to form lithium oxide and CO2.
Reason (R): Lithium being very small in size polarises large carbonate ion leading to the formation of more stable Li2O and CO2.
Options
Both A and R are correct and R is the correct explanation of A.
Both A and R are correct but R is not the correct explanation of A.
Both A and R are not correct.
A is not correct but R is correct.
Solution
Both A and R are correct and R is the correct explanation of A.
Explanation:
Lithium beimg small in size, polarises large carbonate ion. Polarisation is the distortion of electron cloud of the anion by the cation. Thus, the carbonate of lithium decomposes easily on heating to form lithium oxide and CO2. The reaction is shown below.
\[\ce{Li2CO3 ⇌ Li2O + CO2}\]
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