Assertion (A): Lithium carbonate decomposes on heating to give Li2O and CO2, whereas sodium carbonate does not decompose

Question

Assertion (A): Lithium carbonate decomposes on heating to give Li2O and CO2, whereas sodium carbonate does not decompose at the same temperature. Reason (R): The small Li+ ion strongly polarises the carbonate ion and forms an oxide of high lattice enthalpy.

Accepted Answer

Both A and R are true and R is the correct explanation of A

Answer

Both A and R are true but R is not the correct explanation of A

Answer

A is true but R is false

Answer

A is false but R is true

Assertion (A): Lithium carbonate decomposes on heating to give $Li X_{2} O$ and $CO X_{2}$ , whereas sodium carbonate does not decompose at the same temperature. Reason (R): The small $Li X^{+}$ ion strongly polarises the carbonate ion and forms an oxide of high lattice enthalpy.

Answer: A

More questions on Anomalous behaviour of Li and Be, diagonal relationship

Assertion (A): Lithium carbonate decomposes on heating to give LiX2​O and COX2​, whereas sodium carbonate does not decompose at the same temperature. Reason (R): The small LiX+ ion strongly polarises the carbonate ion and forms an oxide of high lattice enthalpy.

Answer: A

More questions on Anomalous behaviour of Li and Be, diagonal relationship

Assertion (A): Lithium carbonate decomposes on heating to give $Li X_{2} O$ and $CO X_{2}$ , whereas sodium carbonate does not decompose at the same temperature. Reason (R): The small $Li X^{+}$ ion strongly polarises the carbonate ion and forms an oxide of high lattice enthalpy.