**Match the reactions in Column I with Column II (JEE Archive):**
**Column I:**
(A)
(B)
(C)
(D)
**Column II:**
(p) Intramolecular redox
(q) Disproportionation

Question

**Match the reactions in Column I with Column II (JEE Archive):**
**Column I:**
(A) $NH_4NO_3 \xrightarrow{\Delta} N_2O + 2H_2O$
(B) $NH_4NO_2 \xrightarrow{\Delta} N_2 + 2H_2O$
(C) $PCl_5 \xrightarrow{\Delta} PCl_3 + Cl_2$
(D) $3Cl_2 + 6OH^- \rightarrow 5Cl^- + ClO_3^- + 3H_2O$
**Column II:**
(p) Intramolecular redox
(q) Disproportionation
(r) Decomposition
(s) Redox reaction

Prashant Kotian · Accepted Answer

Correct answer: A. **Logic:**
(A/B) The same molecule contains the oxidant () and reductant (). It's intramolecular redox and thermal decomposition.
(C) decomposes. remains +5, but goes from -1 to 0 (oxidation) and -1 (Wait, is +5 in both; however in is 0. This is redox).
(D) (0) goes to -1 and +5 (Disproportionation).

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