question_answer

The number of \[\sigma \] and \[\pi \] bonds present in \[CH\equiv C-C{{H}_{2}}-CH=C{{H}_{2}}\]is

A) \[10\sigma ,3\pi \]          

B)        \[10\sigma ,2\pi \]          

C) \[9\sigma ,3\pi \]            

D)        \[10\sigma ,2\pi \]

Correct Answer: A

Solution :

Key Idea: (i) The first bond between any two atoms is sigma \[(\sigma )\]. (ii) Rest are pi \[(\pi )\] bonds. Draw the structure of compound and count the number of sigma and pi bonds in it. \[\therefore \] It has \[10\sigma \] and \[3\pi \] bonds