JEE MAIN - Chemistry (2020 - 8th January Evening Slot - No. 17)
Arrange the following bonds according to their
average bond energies in descending order :
C–Cl, C–Br, C–F, C–I
C–Cl, C–Br, C–F, C–I
C–Br > C–I > C–Cl > C–F
C–Cl > C–Br > C–I > C–F
C–I > C–Br > C–Cl > C–F
C–F > C–Cl > C–Br > C–I
Explanation
Bond length order in carbon halogen bonds are
in the order of C – F $$<$$ C – Cl $$<$$ C – Br $$<$$ C – I
Hence, Bond energy order
C – F $$>$$ C – Cl $$>$$ C – Br $$>$$ C – I
in the order of C – F $$<$$ C – Cl $$<$$ C – Br $$<$$ C – I
Hence, Bond energy order
C – F $$>$$ C – Cl $$>$$ C – Br $$>$$ C – I
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