Hydrocarbons Question 103

Question: Triple bond of ethyne is made of or Cylindrical shape of an alkyne is due to [EAMCET 1978; NCERT 1979; CBSE PMT 1997; Manipal MEE 1995; Bihar MEE 1996]

Options:

A) Three $ \sigma -bonds $

B) Three $ \pi -bonds $

C) Two $ \sigma $ and one $ \pi -bond $

D) Two $ \pi $ and one $ \sigma -bond $

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Answer:

Correct Answer: D

Solution:

In $ CH\equiv CH $ triple bond consists of one $ \sigma $ and two $ \pi $ bonds.