JEE Main Chemistry question

In the series ethane, ethylene and acetylene, the C–H bond energy is

(A)The same in all three compounds
(B)Greatest in ethane
(C)Greatest in ethylene
(D)Greatest in acetyleneCorrect

Answer: (D)

Solution

C–H bond strength increases with increasing s-character of the carbon hybrid orbital: ethane (, 25% s-character), ethylene (, 33% s-character), and acetylene (, 50%

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Question ID VK-133436