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Answer» 
Solution:Refer ATTACHMENT there are 3 attachments - In C2H5Cl there are 7 sigma BOND, zero pi bond and 3 lone pair
- In CH2 there are 2 sigma bond, zero pi bond and 1 lone pair
- In CH3—CH= CH2 there are 9 sigma bond, 1 pi bond and zero lone pair
Knowledge Booster:- In a COMPOUND, single bond is called sigma bond
- In double bond, one is sigma bond and other is pi bond
- In triple bond, there are one sigma bond and two pi bond
- Sigma bond is strong bond and pi bond is weak bond
- Sigma bond is less reactive than pi bond while pi bond is more reactive
- Sigma bond has axial or HEED overlapping while pi bond has lateral overlapping of orbital
- Solve more such questions to get good hold on it
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