Oxidation Number
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CHXI08:REDOX REACTIONS

315227 Match Column I with Column II for the oxidation states of the central atoms.
Column I
Column II
A
\(\rm{{\rm{C}}{{\rm{r}}_{\rm{2}}}{\rm{O}}_{\rm{7}}^{{\rm{2 - }}}}\)
P
\(\rm{{\rm{ + 3}}}\)
B
\(\rm{{\rm{MnO}}_{\rm{4}}^{\rm{ - }}}\)
Q
\(\rm{{\rm{ + 4}}}\)
C
\(\rm{{\rm{VO}}_{\rm{3}}^{\rm{ - }}}\)
R
\(\rm{{\rm{ + 5}}}\)
D
\(\rm{{\rm{FeF}}_{\rm{6}}^{{\rm{3 - }}}}\)
S
\(\rm{{\rm{ + 6}}}\)
T
\(\rm{{\rm{ + 7}}}\)

1 A - S, B - T, C - R, D - P
2 A - P, B - Q, C - R, D - S
3 A - Q, B - R, C - S, D - T
4 A - T, B - S, C - S, D - R
CHXI08:REDOX REACTIONS

315228 When ethane is burnt in presence of excess of oxygen, the oxidation number of carbon changes by

1 +8
2 +7
3 +3
4 +4
CHXI08:REDOX REACTIONS

315229 When a manganous salt is fused with the mixture of \(\mathrm{\mathrm{KNO}_{3}}\) and the solid \(\mathrm{\mathrm{NaOH}}\), the oxidation number of Mn changes from +2 to

1 +4
2 +3
3 +6
4 +7
CHXI08:REDOX REACTIONS

315230 In which of the following compounds, iron has an oxidation number of +3 ?

1 \(\mathrm{Fe}\left(\mathrm{NO}_{3}\right)_{2}\)
2 \(\mathrm{FeC}_{2} \mathrm{O}_{4}\)
3 \(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{3}\)
4 \(\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4} \cdot \mathrm{FeSO}_{4} \cdot \mathrm{H}_{2} \mathrm{O}\)
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CHXI08:REDOX REACTIONS

315227 Match Column I with Column II for the oxidation states of the central atoms.
Column I
Column II
A
\(\rm{{\rm{C}}{{\rm{r}}_{\rm{2}}}{\rm{O}}_{\rm{7}}^{{\rm{2 - }}}}\)
P
\(\rm{{\rm{ + 3}}}\)
B
\(\rm{{\rm{MnO}}_{\rm{4}}^{\rm{ - }}}\)
Q
\(\rm{{\rm{ + 4}}}\)
C
\(\rm{{\rm{VO}}_{\rm{3}}^{\rm{ - }}}\)
R
\(\rm{{\rm{ + 5}}}\)
D
\(\rm{{\rm{FeF}}_{\rm{6}}^{{\rm{3 - }}}}\)
S
\(\rm{{\rm{ + 6}}}\)
T
\(\rm{{\rm{ + 7}}}\)

1 A - S, B - T, C - R, D - P
2 A - P, B - Q, C - R, D - S
3 A - Q, B - R, C - S, D - T
4 A - T, B - S, C - S, D - R
CHXI08:REDOX REACTIONS

315228 When ethane is burnt in presence of excess of oxygen, the oxidation number of carbon changes by

1 +8
2 +7
3 +3
4 +4
CHXI08:REDOX REACTIONS

315229 When a manganous salt is fused with the mixture of \(\mathrm{\mathrm{KNO}_{3}}\) and the solid \(\mathrm{\mathrm{NaOH}}\), the oxidation number of Mn changes from +2 to

1 +4
2 +3
3 +6
4 +7
CHXI08:REDOX REACTIONS

315230 In which of the following compounds, iron has an oxidation number of +3 ?

1 \(\mathrm{Fe}\left(\mathrm{NO}_{3}\right)_{2}\)
2 \(\mathrm{FeC}_{2} \mathrm{O}_{4}\)
3 \(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{3}\)
4 \(\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4} \cdot \mathrm{FeSO}_{4} \cdot \mathrm{H}_{2} \mathrm{O}\)
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CHXI08:REDOX REACTIONS

315227 Match Column I with Column II for the oxidation states of the central atoms.
Column I
Column II
A
\(\rm{{\rm{C}}{{\rm{r}}_{\rm{2}}}{\rm{O}}_{\rm{7}}^{{\rm{2 - }}}}\)
P
\(\rm{{\rm{ + 3}}}\)
B
\(\rm{{\rm{MnO}}_{\rm{4}}^{\rm{ - }}}\)
Q
\(\rm{{\rm{ + 4}}}\)
C
\(\rm{{\rm{VO}}_{\rm{3}}^{\rm{ - }}}\)
R
\(\rm{{\rm{ + 5}}}\)
D
\(\rm{{\rm{FeF}}_{\rm{6}}^{{\rm{3 - }}}}\)
S
\(\rm{{\rm{ + 6}}}\)
T
\(\rm{{\rm{ + 7}}}\)

1 A - S, B - T, C - R, D - P
2 A - P, B - Q, C - R, D - S
3 A - Q, B - R, C - S, D - T
4 A - T, B - S, C - S, D - R
CHXI08:REDOX REACTIONS

315228 When ethane is burnt in presence of excess of oxygen, the oxidation number of carbon changes by

1 +8
2 +7
3 +3
4 +4
CHXI08:REDOX REACTIONS

315229 When a manganous salt is fused with the mixture of \(\mathrm{\mathrm{KNO}_{3}}\) and the solid \(\mathrm{\mathrm{NaOH}}\), the oxidation number of Mn changes from +2 to

1 +4
2 +3
3 +6
4 +7
CHXI08:REDOX REACTIONS

315230 In which of the following compounds, iron has an oxidation number of +3 ?

1 \(\mathrm{Fe}\left(\mathrm{NO}_{3}\right)_{2}\)
2 \(\mathrm{FeC}_{2} \mathrm{O}_{4}\)
3 \(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{3}\)
4 \(\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4} \cdot \mathrm{FeSO}_{4} \cdot \mathrm{H}_{2} \mathrm{O}\)
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CHXI08:REDOX REACTIONS

315227 Match Column I with Column II for the oxidation states of the central atoms.
Column I
Column II
A
\(\rm{{\rm{C}}{{\rm{r}}_{\rm{2}}}{\rm{O}}_{\rm{7}}^{{\rm{2 - }}}}\)
P
\(\rm{{\rm{ + 3}}}\)
B
\(\rm{{\rm{MnO}}_{\rm{4}}^{\rm{ - }}}\)
Q
\(\rm{{\rm{ + 4}}}\)
C
\(\rm{{\rm{VO}}_{\rm{3}}^{\rm{ - }}}\)
R
\(\rm{{\rm{ + 5}}}\)
D
\(\rm{{\rm{FeF}}_{\rm{6}}^{{\rm{3 - }}}}\)
S
\(\rm{{\rm{ + 6}}}\)
T
\(\rm{{\rm{ + 7}}}\)

1 A - S, B - T, C - R, D - P
2 A - P, B - Q, C - R, D - S
3 A - Q, B - R, C - S, D - T
4 A - T, B - S, C - S, D - R
CHXI08:REDOX REACTIONS

315228 When ethane is burnt in presence of excess of oxygen, the oxidation number of carbon changes by

1 +8
2 +7
3 +3
4 +4
CHXI08:REDOX REACTIONS

315229 When a manganous salt is fused with the mixture of \(\mathrm{\mathrm{KNO}_{3}}\) and the solid \(\mathrm{\mathrm{NaOH}}\), the oxidation number of Mn changes from +2 to

1 +4
2 +3
3 +6
4 +7
CHXI08:REDOX REACTIONS

315230 In which of the following compounds, iron has an oxidation number of +3 ?

1 \(\mathrm{Fe}\left(\mathrm{NO}_{3}\right)_{2}\)
2 \(\mathrm{FeC}_{2} \mathrm{O}_{4}\)
3 \(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{3}\)
4 \(\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4} \cdot \mathrm{FeSO}_{4} \cdot \mathrm{H}_{2} \mathrm{O}\)
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