08. REDOX REACTIONS[KARNATAKA CET EXCLUSIVE]
CHEMISTRY(KCET)

285310 \(3 \mathrm{ClO}^{-}(\mathrm{aq}) \rightarrow \mathrm{ClO}^{-}+2 \mathrm{Cl}^{-}\)is an example of

1 oxidation reaction
2 reduction reaction
3 disproportionation reaction
4 decomposition reaction.
CHEMISTRY(KCET)

285311 The standard reduction potential at 298 K for the followinghalf cell reaction:

\(\mathrm{Zn}^{2+}(\mathrm{aq})+2 e^{-} \rightarrow \mathrm{Zn}(\mathrm{s}) ; \mathrm{E}^{\circ}=-0.762 \mathrm{~V}\)
\(\mathrm{Cr}^{3+}(\mathrm{aq})+3 e^{-} \rightarrow \mathrm{Cr}(\mathrm{s}) ; \mathrm{E}^{\circ}=0.740 \mathrm{~V}\)
\(2 \mathrm{H}^{+}(\mathrm{aq})+2 e^{-} \rightarrow \mathrm{H}_2(\mathrm{~g}) ; \mathrm{E}^{\circ}=0.0 \mathrm{~V}\)
\(\mathrm{F}_2(\mathrm{~g})+2 e^{-} \rightarrow 2 \mathrm{~F}^{-}(\mathrm{aq}) ; \mathrm{E}^{\circ}=2.87 \mathrm{~V}\)
Which of the following is the strongest reducing agent?

1 \(\mathrm{Cr}(\mathrm{s})\)
2 \(\mathrm{Zn}(\mathrm{s})\)
3 \(\mathrm{H}_2(\mathrm{~g})\)
4 \(\mathrm{F}_2(\mathrm{~g})\)
CHEMISTRY(KCET)

285310 \(3 \mathrm{ClO}^{-}(\mathrm{aq}) \rightarrow \mathrm{ClO}^{-}+2 \mathrm{Cl}^{-}\)is an example of

1 oxidation reaction
2 reduction reaction
3 disproportionation reaction
4 decomposition reaction.
CHEMISTRY(KCET)

285311 The standard reduction potential at 298 K for the followinghalf cell reaction:

\(\mathrm{Zn}^{2+}(\mathrm{aq})+2 e^{-} \rightarrow \mathrm{Zn}(\mathrm{s}) ; \mathrm{E}^{\circ}=-0.762 \mathrm{~V}\)
\(\mathrm{Cr}^{3+}(\mathrm{aq})+3 e^{-} \rightarrow \mathrm{Cr}(\mathrm{s}) ; \mathrm{E}^{\circ}=0.740 \mathrm{~V}\)
\(2 \mathrm{H}^{+}(\mathrm{aq})+2 e^{-} \rightarrow \mathrm{H}_2(\mathrm{~g}) ; \mathrm{E}^{\circ}=0.0 \mathrm{~V}\)
\(\mathrm{F}_2(\mathrm{~g})+2 e^{-} \rightarrow 2 \mathrm{~F}^{-}(\mathrm{aq}) ; \mathrm{E}^{\circ}=2.87 \mathrm{~V}\)
Which of the following is the strongest reducing agent?

1 \(\mathrm{Cr}(\mathrm{s})\)
2 \(\mathrm{Zn}(\mathrm{s})\)
3 \(\mathrm{H}_2(\mathrm{~g})\)
4 \(\mathrm{F}_2(\mathrm{~g})\)