Calcium imide on hydrolysis will give gas (B) which on oxidation by bleaching powder given gas (C). Gas (C) on reaction with magnesium gives compound (D). (D) on hydrolysis gives again gas (B). (B), (

Question

Calcium imide on hydrolysis will give gas (B) which on oxidation by bleaching powder given gas (C). Gas (C) on reaction with magnesium gives compound (D). (D) on hydrolysis gives again gas (B). (B), (C) and (D) are:

Prashant Kotian · Accepted Answer

Correct answer: A. Step 1: Concentrated sulfuric acid (H2SO4) undergoes self-ionization (autoprotolysis): 2H2SO4 <=> H3SO4^+ + HSO4^-. Step 2: Adding potassium bisulfate (KHSO4) introduces a large concentration of HSO4^- ions (bisulfate/hydrogen sulfate ions), which is the conjugate base of H2SO4. Step 3: By Le Chatelier's principle, the common-ion effect of HSO4^- shifts the autoprotolysis equilibrium to the left, decreasing the concentration of the highly acidic H3SO4^+ ions and thus decreasing the overall acidity of the solution (option b).

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