Problem
Problem
Calcium imide on hydrolysis gives gas (B) which on oxidation by bleaching powder gives gas (C). Gas (C) on reaction with magnesium give compound (D) which on hydrolysis gives again gas (B). Identify (B), (C) and (D).Intuitive explanation
This is a cycle problem where you need to track what happens when calcium imide breaks down in water, then gets oxidized, then reacts with magnesium. The key insight is recognizing that gas (B) is likely a simple nitrogen compound formed by hydrolysis, gas (C) is what you get when you oxidize (B) using a strong oxidizing agent, and (D) is a magnesium compound that cycles back to (B) upon hydrolysis. Follow the nitrogen atom through each transformation—it changes oxidation state with oxidation and reduction, but the cycle closing tells you the compounds must be chemically related.
Intuitive explanation
This is a cycle problem where you need to track what happens when calcium imide breaks down in water, then gets oxidized, then reacts with magnesium. The key insight is recognizing that gas (B) is likely a simple nitrogen compound formed by hydrolysis, gas (C) is what you get when you oxidize (B) using a strong oxidizing agent, and (D) is a magnesium compound that cycles back to (B) upon hydrolysis. Follow the nitrogen atom through each transformation—it changes oxidation state with oxidation and reduction, but the cycle closing tells you the compounds must be chemically related.