Question

(d) Mo (VI)
Q.31. Which of the carbonate is unstable?
(a) Na,coz (b) Li,coz (c) Cs,coz (d) K2CO3
Q.32. Which of the follo​

Answer 1

Answer : (b) Li,coz

Explanation:

Lithium Carbonate is Unstable Because of the fact that Lithium ions , being smaller in size can not stabilise Carbonate anion and lattice enthalpy of the compound is less. Moreover in thermal decomposition of Li2CO3 yields Li2O and CO2. As Lithium ions can stabilise Oxide anions Li2O is stable of higher lattice enthalpy emission and thus makes thermal decomposition of Li2CO3 more thermodynamically favourable.