AP EAMCET · Chemistry · p Block Elements (Group 15, 16, 17 & 18)
Which one of the following reactions does not occur?
- A \(\mathrm{F}_2+2 \mathrm{Cl}^{-} \longrightarrow 2 \mathrm{~F}^{-}+\mathrm{Cl}_2\)
- B \(\mathrm{Cl}_2+2 \mathrm{~F}^{-} \longrightarrow 2 \mathrm{Cl}^{-}+\mathrm{F}_2\)
- C \(\mathrm{Br}_2+2 \mathrm{I}^{-} \longrightarrow 2 \mathrm{Br}^{-}+\mathrm{I}_2\)
- D \(\mathrm{Cl}_2+2 \mathrm{Br}^{-} \longrightarrow 2 \mathrm{Cl}^{-}+\mathrm{Br}_2\)
Answer & Solution
Correct Answer
(B) \(\mathrm{Cl}_2+2 \mathrm{~F}^{-} \longrightarrow 2 \mathrm{Cl}^{-}+\mathrm{F}_2\)
Step-by-step Solution
Detailed explanation
With progressive increase in atomic number, the reduction potential of halogens decreases, thus oxidising power also decreases. Hence, a halogen with lower atomic number will oxidise the halide ion of higher atomic number and therefore, will liberate them from their salt…
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