[SEE DIAGRAM] [A] colourless salt --(KOH, Δ)-- [B] gas (gives white fumes with HCl) [A] colourless salt --(CaCl2)-- [C] white ppt. --(KMnO4, purple)-- colourless solution

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[SEE DIAGRAM]
[A] colourless salt --(KOH, Δ)--> [B] gas (gives white fumes with HCl)
[A] colourless salt --(CaCl2)--> [C] white ppt. --(KMnO4, purple)--> colourless 
solution

Prashant Kotian · Accepted Answer

Correct answer: B. NH3 reacts with excess Cl2 to form explosive nitrogen trichloride (NCl3) and HCl.

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