20094
The standard reduction potential for \(L{i^ + }/Li\,;\,\,Z{n^{2 + }}/Zn\,;\) \({H^ + }/{H_2}\) and \(A{g^ + }/Ag\) is \( - 3.05,\,\, - 0.762,\,\,0.00\) and \( + 0.80\,\,V.\) Which of the following has highest reducing capacity
1 \(Ag\)
2 \({H_2}\)
3 \(Zn\)
4 \(Li\)
Explanation:
(d)\({E^o} = - 3.05\,L{i^ + }/Li\) is most negative (minimum) and hence \(Li\) has maximum tendency to lose electrons or it is the strongest reducing agent.
ELECTROCHEMISTRY
20095
If an iron rod is dipped in \(CuS{O_4}\) solution
1 Blue colour of the solution turns green
2 Brown layer is deposited on iron rod
3 No change occurs in the colour of the solution
4 Blue colour of the solution vanishes
Explanation:
(b)Brown layer is deposited on iron rod because \(Cu\) has greater than reduction potential than that of \(F{e^{2 + }}\).
ELECTROCHEMISTRY
20096
\({E^o}\) values of \(M{g^{2 + }}/Mg\) is \( - 2.37\,V\), of \(Z{n^{2 + }}/Zn\) is \( - 0.76\,V\) and \(F{e^{2 + }}/Fe\) is \( - 0.44\,V\). Which of the following statements is correct
1 \(Zn\) will reduce \(F{e^{2 + }}\)
2 \(Zn\) will reduce \(M{g^{2 + }}\)
3 \(Mg\) oxidises \(Fe\)
4 \(Zn\) oxidises \(Fe\)
Explanation:
(a) \(E_{Z{n^{ + 2 }}/Zn}^o < E_{F{e^{ + 2 }}/Fe}^o\), so \( Zn\) will reduce \(F{e^{ + 2}}\). \(Zn\) cannot reduce \(M{g^{2 + }}\) because \(E_{Z{n^{ + 2 }}/Zn}^o > E_{M{g^{ + 2 }}/Mg}^o\) On similar reason \(Mg\) and \(Zn\) cannot oxidize \(Fe\).
20094
The standard reduction potential for \(L{i^ + }/Li\,;\,\,Z{n^{2 + }}/Zn\,;\) \({H^ + }/{H_2}\) and \(A{g^ + }/Ag\) is \( - 3.05,\,\, - 0.762,\,\,0.00\) and \( + 0.80\,\,V.\) Which of the following has highest reducing capacity
1 \(Ag\)
2 \({H_2}\)
3 \(Zn\)
4 \(Li\)
Explanation:
(d)\({E^o} = - 3.05\,L{i^ + }/Li\) is most negative (minimum) and hence \(Li\) has maximum tendency to lose electrons or it is the strongest reducing agent.
ELECTROCHEMISTRY
20095
If an iron rod is dipped in \(CuS{O_4}\) solution
1 Blue colour of the solution turns green
2 Brown layer is deposited on iron rod
3 No change occurs in the colour of the solution
4 Blue colour of the solution vanishes
Explanation:
(b)Brown layer is deposited on iron rod because \(Cu\) has greater than reduction potential than that of \(F{e^{2 + }}\).
ELECTROCHEMISTRY
20096
\({E^o}\) values of \(M{g^{2 + }}/Mg\) is \( - 2.37\,V\), of \(Z{n^{2 + }}/Zn\) is \( - 0.76\,V\) and \(F{e^{2 + }}/Fe\) is \( - 0.44\,V\). Which of the following statements is correct
1 \(Zn\) will reduce \(F{e^{2 + }}\)
2 \(Zn\) will reduce \(M{g^{2 + }}\)
3 \(Mg\) oxidises \(Fe\)
4 \(Zn\) oxidises \(Fe\)
Explanation:
(a) \(E_{Z{n^{ + 2 }}/Zn}^o < E_{F{e^{ + 2 }}/Fe}^o\), so \( Zn\) will reduce \(F{e^{ + 2}}\). \(Zn\) cannot reduce \(M{g^{2 + }}\) because \(E_{Z{n^{ + 2 }}/Zn}^o > E_{M{g^{ + 2 }}/Mg}^o\) On similar reason \(Mg\) and \(Zn\) cannot oxidize \(Fe\).
20094
The standard reduction potential for \(L{i^ + }/Li\,;\,\,Z{n^{2 + }}/Zn\,;\) \({H^ + }/{H_2}\) and \(A{g^ + }/Ag\) is \( - 3.05,\,\, - 0.762,\,\,0.00\) and \( + 0.80\,\,V.\) Which of the following has highest reducing capacity
1 \(Ag\)
2 \({H_2}\)
3 \(Zn\)
4 \(Li\)
Explanation:
(d)\({E^o} = - 3.05\,L{i^ + }/Li\) is most negative (minimum) and hence \(Li\) has maximum tendency to lose electrons or it is the strongest reducing agent.
ELECTROCHEMISTRY
20095
If an iron rod is dipped in \(CuS{O_4}\) solution
1 Blue colour of the solution turns green
2 Brown layer is deposited on iron rod
3 No change occurs in the colour of the solution
4 Blue colour of the solution vanishes
Explanation:
(b)Brown layer is deposited on iron rod because \(Cu\) has greater than reduction potential than that of \(F{e^{2 + }}\).
ELECTROCHEMISTRY
20096
\({E^o}\) values of \(M{g^{2 + }}/Mg\) is \( - 2.37\,V\), of \(Z{n^{2 + }}/Zn\) is \( - 0.76\,V\) and \(F{e^{2 + }}/Fe\) is \( - 0.44\,V\). Which of the following statements is correct
1 \(Zn\) will reduce \(F{e^{2 + }}\)
2 \(Zn\) will reduce \(M{g^{2 + }}\)
3 \(Mg\) oxidises \(Fe\)
4 \(Zn\) oxidises \(Fe\)
Explanation:
(a) \(E_{Z{n^{ + 2 }}/Zn}^o < E_{F{e^{ + 2 }}/Fe}^o\), so \( Zn\) will reduce \(F{e^{ + 2}}\). \(Zn\) cannot reduce \(M{g^{2 + }}\) because \(E_{Z{n^{ + 2 }}/Zn}^o > E_{M{g^{ + 2 }}/Mg}^o\) On similar reason \(Mg\) and \(Zn\) cannot oxidize \(Fe\).
20094
The standard reduction potential for \(L{i^ + }/Li\,;\,\,Z{n^{2 + }}/Zn\,;\) \({H^ + }/{H_2}\) and \(A{g^ + }/Ag\) is \( - 3.05,\,\, - 0.762,\,\,0.00\) and \( + 0.80\,\,V.\) Which of the following has highest reducing capacity
1 \(Ag\)
2 \({H_2}\)
3 \(Zn\)
4 \(Li\)
Explanation:
(d)\({E^o} = - 3.05\,L{i^ + }/Li\) is most negative (minimum) and hence \(Li\) has maximum tendency to lose electrons or it is the strongest reducing agent.
ELECTROCHEMISTRY
20095
If an iron rod is dipped in \(CuS{O_4}\) solution
1 Blue colour of the solution turns green
2 Brown layer is deposited on iron rod
3 No change occurs in the colour of the solution
4 Blue colour of the solution vanishes
Explanation:
(b)Brown layer is deposited on iron rod because \(Cu\) has greater than reduction potential than that of \(F{e^{2 + }}\).
ELECTROCHEMISTRY
20096
\({E^o}\) values of \(M{g^{2 + }}/Mg\) is \( - 2.37\,V\), of \(Z{n^{2 + }}/Zn\) is \( - 0.76\,V\) and \(F{e^{2 + }}/Fe\) is \( - 0.44\,V\). Which of the following statements is correct
1 \(Zn\) will reduce \(F{e^{2 + }}\)
2 \(Zn\) will reduce \(M{g^{2 + }}\)
3 \(Mg\) oxidises \(Fe\)
4 \(Zn\) oxidises \(Fe\)
Explanation:
(a) \(E_{Z{n^{ + 2 }}/Zn}^o < E_{F{e^{ + 2 }}/Fe}^o\), so \( Zn\) will reduce \(F{e^{ + 2}}\). \(Zn\) cannot reduce \(M{g^{2 + }}\) because \(E_{Z{n^{ + 2 }}/Zn}^o > E_{M{g^{ + 2 }}/Mg}^o\) On similar reason \(Mg\) and \(Zn\) cannot oxidize \(Fe\).
