Q.Find the wrong statement

Step 1. Sodium metal is genuinely used in organic qualitative analysis (the sodium fusion / Lassaigne's test, used to detect N, S and halogens in organic compounds), so statement (a) is correct.

Step 2. Sodium carbonate is indeed water-soluble and its solution (soda extract) is used in inorganic qualitative salt analysis, so statement (b) is correct.

Step 3. The Solvay process depends on sodium bicarbonate being only sparingly soluble, so that it precipitates out of the ammoniacal brine and can be filtered off -- the analogous potassium bicarbonate, KHCO₃, is considerably MORE soluble and does not precipitate under the same conditions, so the Solvay process cannot be used to make potassium carbonate. Statement (c) is therefore the wrong (incorrect …

Check each statement against the known chemistry of alkali metal compounds; the Solvay process's dependence on NaHCO₃'s low solubility …

• Assuming the Solvay process works for any group 1 carbonate just because it works for sodium -- the process specifically exploits sodium bicarbonate's compa …