The bond energies of ${{\rm{F}}_2}$,${\rm{C}}{{\rm{l}}_2},{\rm{B}}{{\rm{r}}_2}$ and ${{\rm{I}}_2}$ are 155.4, 243.6, 193.2 and 151.2 kJ ${\rm{mo}}{{\rm{l}}^{ - 1}}$ respectively. The strongest bond is :

NEET UG CHEMISTRY MCQ: THERMODYNAMICS

1 Medium

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Remembering +4 | -1

The bond energies of

{\mathrm{F}_2}

\mathrm{C}{\mathrm{l}_2},\mathrm{B}{\mathrm{r}_2}

and

{\mathrm{I}_2}

are 155.4, 243.6, 193.2 and 151.2 kJ

\mathrm{mo}{\mathrm{l}^{ - 1}}

respectively. The strongest bond is :

View answer and explanation

Correct option: B

Cl-Cl

Option B (Cl-Cl) is correct because it has the highest bond energy among the given options, indicating the strongest bond.

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{T_i}

{T_f}

\mathrm{H}_2 \mathrm{O}(\mathrm{s}) \rightarrow \mathrm{H}_2 \mathrm{O}(\mathrm{g})

\mathrm{X}_2 \mathrm{O_4(l}) \longrightarrow 2 \mathrm{XO}_2(\mathrm{g}), \Delta U=2.1 \mathrm{~kcal}, \Delta S=20 \mathrm{~cal} \mathrm{~K}^{-1}

300 \mathrm{~K}

\Delta G