For the same number of carbon atoms, three hydrocarbons P, Q and R hav

1.	For the same number of carbon atoms, three hydrocarbons P, Q and R have hydrogen in the ratio of 3 : 2 : 1. Which of the following is incorrect about the reactions shown by P, Q and R? (A) P does not undergo addition reactions. (B) Both Q and R decolourise bromine water. (C) Both Q and R give white precipitate with AgNO3 solution dissolved in NH4OH. (D) None of these
Answer» Correct option (C) Both Q and R give white precipitate with AgNO₃ solution dissolved in NH₄OH. Explanation: Only alkynes give white precipitate with AgNO₃ solution dissolved in NH₄OH. P is C₂H₆, Q is C₂H₄ and R is C₂H_2.

For the same number of carbon atoms, three hydrocarbons P, Q and R have hydrogen in the ratio of 3 : 2 : 1. Which of the following is incorrect about the reactions shown by P, Q and R? (A) P does not undergo addition reactions. (B) Both Q and R decolourise bromine water. (C) Both Q and R give white precipitate with AgNO3 solution dissolved in NH4OH. (D) None of these

Answer»

Correct option (C) Both Q and R give white precipitate with AgNO₃ solution dissolved in NH₄OH.

Explanation:

Only alkynes give white precipitate with AgNO₃ solution dissolved in NH₄OH.

P is C₂H₆, Q is C₂H₄ and R is C₂H_2.