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CBSE Class 12-science Answered

Please answer Q.17 from board paper. Assertion (A): Nucleophilic substitution of iodoethane is easier than chloroethane. Reason (R): Bond energy of C — CI bond is less than C — I bond.
Asked by anubhutiupadhaya | 01 Mar, 2023, 12:30: PM
answered-by-expert Expert Answer
Dear Student,
 
Correct option - (a) A and R are true and R is the correct explanation of A.
 
Solution:
In Iodoethane, the bonding is between s orbital and 3 P orbitals, while in case of chloroethane, the bonding is between 2p and 3p orbital which is more effective.
Also, since less bond energy, it is easier to break C-I bond and hence, easier nucleophilic substitution.
Answered by | 01 Mar, 2023, 05:28: PM
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