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Question

What is the liquid product that is formed on decomposition of PCl5?

A
Cl2
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B
HCl
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C
PCl3
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D
No liquid product is formed
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Solution

The correct option is C PCl3
Phosphorus pentachloride, when heated, sublimes but decomposes on stronger heating into phosphorus trichloride (a colourless oily liquid) and chlorine gas.
PCl5ΔPCl3+Cl2

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