Question

Select correct statement(s).

• A. $L{i}_{2}C{O}_3$ is only sparingly soluble in water and no $LiHC{O}_3$ has been isolated.
• B. $K_{2}C{O}_3$ cannot be made by a method similar to the ammonia-soda process.
• C. $LiC{O}_3$ and $MgC{O}_3$ both are thermally stable.
• D. $N{a}_{2}C{O}_3\cdot NaHC{O}_3\cdot 2H_{2}O$ is a mineral called trona.

Answer 1

Answer: (B), (D)

$K_{2}C{O}_3$ cannot be made by a method similar to the ammonia-soda process.
$N{a}_{2}C{O}_3\cdot NaHC{O}_3\cdot 2H_{2}O$ is a mineral called trona.

(A) Lithium carbonate is soluble in water and lithium being less electropositive, does not form solid bicarbonate.

Hence, the statement (A) is incorrect.

(B) Potassium carbonate cannot be made by a method similar to the ammonia-soda process as potassium bicarbonate is highly soluble in water and it will not precipitate.

Thus, the statement (B) is correct.

(C) Lithium carbonate is thermally unstable as it easily decomposes on heating.
Thus, the statement (C) is incorrect.

(D) $N{a}_{2}C{O}_3\cdot NaHC{O}_3\cdot 2H_{2}O$ is a mineral called trona.
It is also called trisodium hydrogen carbonate dihydrate or sodium sesquicarbonate dihydrate

Thus, statement (D) is correct.

Hence, the correct options are $\text{B}$ and $\text{D}$