Question
Chemistry Question on Classification Of Organic Compounds
Which of the following is the most suitable reagent used to distinguish compound (3) from rest of the compounds? 1. CH3−C≡C−CH32. CH3−CH2−CH2−CH33. CH3−CH2C : CH4. CH3−CH=CH2
A
(A) Bromine in carbon tetrachloride
B
(B) Bromine in acetic acid
C
(C) Alkaline KMnO4
D
(D) Ammoniacal silver nitrate
Answer
(D) Ammoniacal silver nitrate
Explanation
Solution
Explanation:
Ammoniacal silver nitrate is used to distinguish terminal alkynes groups.But-1-yne reacts with ammoniacal silver nitrate to give a white precipitate. CH3−CH2−C≡CHA(NH3)2(va)(inamm oniacal cilver nitrate )=CH3CH2C≡C−Ag+(s)but-1-yneCH3−C≡C−CH3⟶no reaction but-2-yne