Question

Compare thermal stability of $L{i}_{2}C{O}_3$ and $BeC{O}_3$ :

• A. $L{i}_{2}C{O}_3>BeC{O}_3$
• B. $L{i}_{2}C{O}_3<BeC{O}_3$
• C. $L{i}_{2}C{O}_3=BeC{O}_3$
• D. None of these

Answer 1

The correct option is A $L{i}_{2}C{O}_3>BeC{O}_3$

Thermal stability is the stability of a molecule at high temperatures. $Li$ and $Be$ are 2nd-period elements , so as we move from left to right in a period the thermal stability of carbonates, decreased due to a decrease in the size of the ions. Hence the thermal stability of $L{i}_{2}C{O}_3>BeC{O}_3$. Option A is correct.