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With excess of \( C l_{2}, \) ammonia forms:

1. ammonium chloride
2. nitrogen trichloride
3. nitrosyl chloride
4. nitrogen

Correct answer: nitrogen trichloride

Solution

When chlorine is present in excess, ammonia undergoes successive chlorination rather than stopping at ammonium chloride. The product formed is nitrogen trichloride, NCl3.

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