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Question:

P and Q, respectively, are the sodium salts of: hypochlorous and chloric acids; hypochlorous and chlorous acids; chloric and perchloric acids; chloric and hypochlorous acids.

hypochlorus and chlorous acids

chloric and hypochlorous acids

hypochlorus and chloric acids

chloric and perchloric acids

Solution:

2NaOH(Cold + dil) + Cl₂ → NaCl + NaClO(P) + H₂O
6NaOH(Hot + dil) + 3Cl₂ → 5NaCl + NaClO₃(Q) + 3H₂O
SO₂ + Cl₂(Charcoal) → SO₂Cl₂(R)
SO₂Cl₂ + P₄ → PCl₅(S) + SO₂
PCl₅ + 4H₂O → H₃PO₄(T) + 5HCl