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What is the liquid product formed on decomposition of PCl5?(a) Cl2(b) HCl(c) PCl3(d) No liquid product is formedThis question was addressed to me in an international level competition.My question is from P-Block Elements in chapter P-Block Elements of Chemistry – Class 12

Answer»

Correct OPTION is (c) PCl3

The best EXPLANATION: Phosphorus pentachloride, when heated, sublimes but decomposes on stronger heating into phosphorus TRICHLORIDE (a colourless pungent-smelling liquid) and chlorine gas.

PCl5 ⇌ PCl3 + Cl2.



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