MHT CET · Chemistry · p Block Elements (Group 15, 16, 17 & 18)
Identify the reactivity order for halogens towards alkanes.
- A \(\mathrm{I}_2\gt\mathrm{Br}_2\gt\mathrm{Cl}_2\gt\mathrm{F}_2\)
- B \(\mathrm{Br}_2\gt\mathrm{Cl}_2\gt\mathrm{F}_2\gt\mathrm{I}_2\)
- C \(\mathrm{F}_2\gt\mathrm{Cl}_2\gt\mathrm{Br}_2\gt\mathrm{I}_2\)
- D \(\mathrm{Cl}_2\gt\mathrm{F}_2\gt\mathrm{Br}_2\gt\mathrm{I}_2\)
Answer & Solution
Correct Answer
(C) \(\mathrm{F}_2\gt\mathrm{Cl}_2\gt\mathrm{Br}_2\gt\mathrm{I}_2\)
Step-by-step Solution
Detailed explanation
Due to electronegativity difference, the reactivity order for halogens towards alkanes is:
\(\longleftarrow \frac{\mathrm{F}_2\gt\mathrm{Cl}_2\gt\mathrm{Br}_2\gt\mathrm{I}_2}{+\mathrm{I} \text { effect }}\)
\(\longleftarrow \frac{\mathrm{F}_2\gt\mathrm{Cl}_2\gt\mathrm{Br}_2\gt\mathrm{I}_2}{+\mathrm{I} \text { effect }}\)
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