Chemistry

Which of the following is the best reagent to distinguish between ethylene and acetylene ?

P — Bromine water

Q — Ammoniacal silver nitrate solution

R — Acidified potassium dichromate solution

  1. Only P
  2. Only Q
  3. Both P and Q
  4. Both Q and R

Organic Chemistry

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Answer

Only Q

Reason — Acetylene reacts with ammoniacal silver nitrate solution to give white precipitate of silver acetylide. Whereas, ethylene gives no reaction with ammoniacal silver nitrate solution.

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