$'\mathrm{C}-\mathrm{X}'$ બંધની બંધએન્થાલ્પીની સાચી શ્રેણી શોધો.

Question

A$\mathrm{CH}_{3}-\mathrm{F}<\mathrm{CH}_{3}-\mathrm{Cl}<\mathrm{CH}_{3}-\mathrm{Br}<\mathrm{CH}_{3}-\mathrm{I}$
B$\mathrm{CH}_{3}-\mathrm{F}>\mathrm{CH}_{3}-\mathrm{Cl}>\mathrm{CH}_{3}-\mathrm{Br}>\mathrm{CH}_{3}-\mathrm{I}$
C$\mathrm{CH}_{3}-\mathrm{F}<\mathrm{CH}_{3}-\mathrm{Cl}>\mathrm{CH}_{3}-\mathrm{Br}>\mathrm{CH}_{3}-\mathrm{I}$
D$\mathrm{CH}_{3}-\mathrm{Cl}>\mathrm{CH}_{3}-\mathrm{F}>\mathrm{CH}_{3}-\mathrm{Br}>\mathrm{CH}_{3}-\mathrm{I}$

NEET 2021, Easy

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Solution

b
Bond enthalpy of $C-X$ bond

$\mathrm{CH}_{3}-\mathrm{F}>\mathrm{CH}_{3}-\mathrm{Cl}>\mathrm{CH}_{3}-\mathrm{Br}>\mathrm{CH}_{3}-\mathrm{I}$

Down the group with the increase in size of halogen in C-X bond, energy decreases.

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