Oxidation Number
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CHXI08:REDOX REACTIONS

315231 In the given reaction,
\(\mathrm{\mathrm{FeSO}_{4}+\mathrm{KClO}_{3} \rightarrow \mathrm{KCl}+\mathrm{Fe}_{2}\left(\mathrm{SO}_{4}\right)_{3}}\)
I. \(\mathrm{\mathrm{FeSO}_{4}}\) acts as reducing agent.
II. \(\mathrm{\mathrm{KClO}_{3}}\) is reduced.
III. The change in oxidation number of \(\mathrm{\mathrm{Fe}}\) is 2.
IV. The change in oxidation number of \(\mathrm{\mathrm{Cl}}\) is 6 .
Which of the above statements is/are correct?

1 I and III
2 II and III
3 I, II and IV
4 All of these
CHXI08:REDOX REACTIONS

315232 Oxidation state of nitrogen is incorrectly given in
\(\,{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} \,\,\,\,\,{\rm{Compound}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{Oxidation}}\,\,{\rm{state}}\)

1 \(\left[ {{\rm{Co}}{{\left( {{\rm{N}}{{\rm{H}}_{\rm{3}}}} \right)}_{\rm{5}}}{\rm{Cl}}} \right]{\rm{C}}{{\rm{l}}_{\rm{2}}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{ - 3}}\)
2 \({\rm{N}}{{\rm{H}}_{\rm{2}}}{\rm{OH}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{ - 1}}\)
3 \(\left( {{{\rm{N}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}} \right){\rm{S}}{{\rm{O}}_{\rm{4}}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{ + 2}}\)
4 \({\rm{M}}{{\rm{g}}_{\rm{3}}}{{\rm{N}}_{\rm{2}}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{ - 3}}\)
CHXI08:REDOX REACTIONS

315233 \(4 \mathrm{P}+3 \mathrm{NaOH}+3 \mathrm{H}_{2} \mathrm{O} \rightarrow 3 \mathrm{NaH}_{2} \mathrm{PO}_{2}+\mathrm{PH}_{3}\)
In the above reaction, find the element undergoing both oxidation and reduction.

1 Na
2 P
3 H
4 O
CHXI08:REDOX REACTIONS

315234 What is the change in oxidation number of carbon in the following reaction?\(\mathrm{\mathrm{CH}_{4}(\mathrm{~g})+4 \mathrm{Cl}_{2}(\mathrm{~g}) \rightarrow \mathrm{CCl}_{4}(1)+4 \mathrm{HCl}(\mathrm{g})}\)

1 \({\rm{0}}\,\,{\rm{to}}\,\,{\rm{ + 4}}\)
2 \({\rm{ - 4}}\,\,{\rm{to}}\,\,{\rm{ + 4}}\)
3 \({\rm{0}}\,\,{\rm{to}}\,\,{\rm{ - 4}}\)
4 \({\rm{ + 4}}\,\,{\rm{to}}\,\,{\rm{ + 4}}\)
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CHXI08:REDOX REACTIONS

315231 In the given reaction,
\(\mathrm{\mathrm{FeSO}_{4}+\mathrm{KClO}_{3} \rightarrow \mathrm{KCl}+\mathrm{Fe}_{2}\left(\mathrm{SO}_{4}\right)_{3}}\)
I. \(\mathrm{\mathrm{FeSO}_{4}}\) acts as reducing agent.
II. \(\mathrm{\mathrm{KClO}_{3}}\) is reduced.
III. The change in oxidation number of \(\mathrm{\mathrm{Fe}}\) is 2.
IV. The change in oxidation number of \(\mathrm{\mathrm{Cl}}\) is 6 .
Which of the above statements is/are correct?

1 I and III
2 II and III
3 I, II and IV
4 All of these
CHXI08:REDOX REACTIONS

315232 Oxidation state of nitrogen is incorrectly given in
\(\,{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} \,\,\,\,\,{\rm{Compound}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{Oxidation}}\,\,{\rm{state}}\)

1 \(\left[ {{\rm{Co}}{{\left( {{\rm{N}}{{\rm{H}}_{\rm{3}}}} \right)}_{\rm{5}}}{\rm{Cl}}} \right]{\rm{C}}{{\rm{l}}_{\rm{2}}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{ - 3}}\)
2 \({\rm{N}}{{\rm{H}}_{\rm{2}}}{\rm{OH}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{ - 1}}\)
3 \(\left( {{{\rm{N}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}} \right){\rm{S}}{{\rm{O}}_{\rm{4}}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{ + 2}}\)
4 \({\rm{M}}{{\rm{g}}_{\rm{3}}}{{\rm{N}}_{\rm{2}}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{ - 3}}\)
CHXI08:REDOX REACTIONS

315233 \(4 \mathrm{P}+3 \mathrm{NaOH}+3 \mathrm{H}_{2} \mathrm{O} \rightarrow 3 \mathrm{NaH}_{2} \mathrm{PO}_{2}+\mathrm{PH}_{3}\)
In the above reaction, find the element undergoing both oxidation and reduction.

1 Na
2 P
3 H
4 O
CHXI08:REDOX REACTIONS

315234 What is the change in oxidation number of carbon in the following reaction?\(\mathrm{\mathrm{CH}_{4}(\mathrm{~g})+4 \mathrm{Cl}_{2}(\mathrm{~g}) \rightarrow \mathrm{CCl}_{4}(1)+4 \mathrm{HCl}(\mathrm{g})}\)

1 \({\rm{0}}\,\,{\rm{to}}\,\,{\rm{ + 4}}\)
2 \({\rm{ - 4}}\,\,{\rm{to}}\,\,{\rm{ + 4}}\)
3 \({\rm{0}}\,\,{\rm{to}}\,\,{\rm{ - 4}}\)
4 \({\rm{ + 4}}\,\,{\rm{to}}\,\,{\rm{ + 4}}\)
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CHXI08:REDOX REACTIONS

315231 In the given reaction,
\(\mathrm{\mathrm{FeSO}_{4}+\mathrm{KClO}_{3} \rightarrow \mathrm{KCl}+\mathrm{Fe}_{2}\left(\mathrm{SO}_{4}\right)_{3}}\)
I. \(\mathrm{\mathrm{FeSO}_{4}}\) acts as reducing agent.
II. \(\mathrm{\mathrm{KClO}_{3}}\) is reduced.
III. The change in oxidation number of \(\mathrm{\mathrm{Fe}}\) is 2.
IV. The change in oxidation number of \(\mathrm{\mathrm{Cl}}\) is 6 .
Which of the above statements is/are correct?

1 I and III
2 II and III
3 I, II and IV
4 All of these
CHXI08:REDOX REACTIONS

315232 Oxidation state of nitrogen is incorrectly given in
\(\,{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} \,\,\,\,\,{\rm{Compound}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{Oxidation}}\,\,{\rm{state}}\)

1 \(\left[ {{\rm{Co}}{{\left( {{\rm{N}}{{\rm{H}}_{\rm{3}}}} \right)}_{\rm{5}}}{\rm{Cl}}} \right]{\rm{C}}{{\rm{l}}_{\rm{2}}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{ - 3}}\)
2 \({\rm{N}}{{\rm{H}}_{\rm{2}}}{\rm{OH}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{ - 1}}\)
3 \(\left( {{{\rm{N}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}} \right){\rm{S}}{{\rm{O}}_{\rm{4}}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{ + 2}}\)
4 \({\rm{M}}{{\rm{g}}_{\rm{3}}}{{\rm{N}}_{\rm{2}}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{ - 3}}\)
CHXI08:REDOX REACTIONS

315233 \(4 \mathrm{P}+3 \mathrm{NaOH}+3 \mathrm{H}_{2} \mathrm{O} \rightarrow 3 \mathrm{NaH}_{2} \mathrm{PO}_{2}+\mathrm{PH}_{3}\)
In the above reaction, find the element undergoing both oxidation and reduction.

1 Na
2 P
3 H
4 O
CHXI08:REDOX REACTIONS

315234 What is the change in oxidation number of carbon in the following reaction?\(\mathrm{\mathrm{CH}_{4}(\mathrm{~g})+4 \mathrm{Cl}_{2}(\mathrm{~g}) \rightarrow \mathrm{CCl}_{4}(1)+4 \mathrm{HCl}(\mathrm{g})}\)

1 \({\rm{0}}\,\,{\rm{to}}\,\,{\rm{ + 4}}\)
2 \({\rm{ - 4}}\,\,{\rm{to}}\,\,{\rm{ + 4}}\)
3 \({\rm{0}}\,\,{\rm{to}}\,\,{\rm{ - 4}}\)
4 \({\rm{ + 4}}\,\,{\rm{to}}\,\,{\rm{ + 4}}\)
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CHXI08:REDOX REACTIONS

315231 In the given reaction,
\(\mathrm{\mathrm{FeSO}_{4}+\mathrm{KClO}_{3} \rightarrow \mathrm{KCl}+\mathrm{Fe}_{2}\left(\mathrm{SO}_{4}\right)_{3}}\)
I. \(\mathrm{\mathrm{FeSO}_{4}}\) acts as reducing agent.
II. \(\mathrm{\mathrm{KClO}_{3}}\) is reduced.
III. The change in oxidation number of \(\mathrm{\mathrm{Fe}}\) is 2.
IV. The change in oxidation number of \(\mathrm{\mathrm{Cl}}\) is 6 .
Which of the above statements is/are correct?

1 I and III
2 II and III
3 I, II and IV
4 All of these
CHXI08:REDOX REACTIONS

315232 Oxidation state of nitrogen is incorrectly given in
\(\,{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} \,\,\,\,\,{\rm{Compound}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{Oxidation}}\,\,{\rm{state}}\)

1 \(\left[ {{\rm{Co}}{{\left( {{\rm{N}}{{\rm{H}}_{\rm{3}}}} \right)}_{\rm{5}}}{\rm{Cl}}} \right]{\rm{C}}{{\rm{l}}_{\rm{2}}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{ - 3}}\)
2 \({\rm{N}}{{\rm{H}}_{\rm{2}}}{\rm{OH}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{ - 1}}\)
3 \(\left( {{{\rm{N}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}} \right){\rm{S}}{{\rm{O}}_{\rm{4}}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{ + 2}}\)
4 \({\rm{M}}{{\rm{g}}_{\rm{3}}}{{\rm{N}}_{\rm{2}}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{ - 3}}\)
CHXI08:REDOX REACTIONS

315233 \(4 \mathrm{P}+3 \mathrm{NaOH}+3 \mathrm{H}_{2} \mathrm{O} \rightarrow 3 \mathrm{NaH}_{2} \mathrm{PO}_{2}+\mathrm{PH}_{3}\)
In the above reaction, find the element undergoing both oxidation and reduction.

1 Na
2 P
3 H
4 O
CHXI08:REDOX REACTIONS

315234 What is the change in oxidation number of carbon in the following reaction?\(\mathrm{\mathrm{CH}_{4}(\mathrm{~g})+4 \mathrm{Cl}_{2}(\mathrm{~g}) \rightarrow \mathrm{CCl}_{4}(1)+4 \mathrm{HCl}(\mathrm{g})}\)

1 \({\rm{0}}\,\,{\rm{to}}\,\,{\rm{ + 4}}\)
2 \({\rm{ - 4}}\,\,{\rm{to}}\,\,{\rm{ + 4}}\)
3 \({\rm{0}}\,\,{\rm{to}}\,\,{\rm{ - 4}}\)
4 \({\rm{ + 4}}\,\,{\rm{to}}\,\,{\rm{ + 4}}\)
NEET - 2020
NEET DIGITAL LIBRARY