Corrosion is an example of electrochemical change.
CHXII03:ELECTROCHEMISTRY
329948
Which of the following statements is not correct about rusting of iron?
1 Dissolved acidic oxides \(\mathrm{SO}_{2}, \mathrm{NO}_{2}\) in water act as catalyst in the process of rusting.
2 When \(\mathrm{pH}\) lies above 9 or 10 , rusting of iron does not take place.
3 Coating of iron surface by tin prevents rusting, even if the tin coating is peeling off.
4 Rusting of iron is envisaged as setting up of electrochemical cell on the surface of iron object.
Explanation:
While tin coatings can provide some protection against rusting, if the coating peels off or becomes damaged, it exposes the iron underneath, making it susceptible to rusting. So, the statement is not entirely correct.
JEE - 2024
CHXII03:ELECTROCHEMISTRY
329949
Iron rod is immersed in KCl solution such that half its length is exposed to air and the other half immersed in KCl solution. The part corroded is
1 Part of the rod exposed to air
2 Part of the rod immersed in KCl solution
3 Both (1) & (2)
4 None of these
Explanation:
Due to oxidation of iron.
CHXII03:ELECTROCHEMISTRY
329950
Which of the following statements is not correct about rusting of iron?
1 Dissolved acidic oxides \({\mathrm{\mathrm{SO}_{2}, \mathrm{NO}_{2}}}\) in water act as catalyst in the process of rusting.
2 Coating of iron surface by tin prevents rusting, even if the tin coating is peeling off.
3 When pH lies above 9 or 10 , rusting of iron does not take place.
4 Rusting of iron is envisaged as setting up of electrochemical cell on the surface of iron object.
Explanation:
Rusting of iron speeds up in presence of acidic solution i.e., at lower pH . When tin coating is peeled off of the iron beneath the tin is exposed which lead to initiation of rusting. So, the correct option is (2).
Corrosion is an example of electrochemical change.
CHXII03:ELECTROCHEMISTRY
329948
Which of the following statements is not correct about rusting of iron?
1 Dissolved acidic oxides \(\mathrm{SO}_{2}, \mathrm{NO}_{2}\) in water act as catalyst in the process of rusting.
2 When \(\mathrm{pH}\) lies above 9 or 10 , rusting of iron does not take place.
3 Coating of iron surface by tin prevents rusting, even if the tin coating is peeling off.
4 Rusting of iron is envisaged as setting up of electrochemical cell on the surface of iron object.
Explanation:
While tin coatings can provide some protection against rusting, if the coating peels off or becomes damaged, it exposes the iron underneath, making it susceptible to rusting. So, the statement is not entirely correct.
JEE - 2024
CHXII03:ELECTROCHEMISTRY
329949
Iron rod is immersed in KCl solution such that half its length is exposed to air and the other half immersed in KCl solution. The part corroded is
1 Part of the rod exposed to air
2 Part of the rod immersed in KCl solution
3 Both (1) & (2)
4 None of these
Explanation:
Due to oxidation of iron.
CHXII03:ELECTROCHEMISTRY
329950
Which of the following statements is not correct about rusting of iron?
1 Dissolved acidic oxides \({\mathrm{\mathrm{SO}_{2}, \mathrm{NO}_{2}}}\) in water act as catalyst in the process of rusting.
2 Coating of iron surface by tin prevents rusting, even if the tin coating is peeling off.
3 When pH lies above 9 or 10 , rusting of iron does not take place.
4 Rusting of iron is envisaged as setting up of electrochemical cell on the surface of iron object.
Explanation:
Rusting of iron speeds up in presence of acidic solution i.e., at lower pH . When tin coating is peeled off of the iron beneath the tin is exposed which lead to initiation of rusting. So, the correct option is (2).
Corrosion is an example of electrochemical change.
CHXII03:ELECTROCHEMISTRY
329948
Which of the following statements is not correct about rusting of iron?
1 Dissolved acidic oxides \(\mathrm{SO}_{2}, \mathrm{NO}_{2}\) in water act as catalyst in the process of rusting.
2 When \(\mathrm{pH}\) lies above 9 or 10 , rusting of iron does not take place.
3 Coating of iron surface by tin prevents rusting, even if the tin coating is peeling off.
4 Rusting of iron is envisaged as setting up of electrochemical cell on the surface of iron object.
Explanation:
While tin coatings can provide some protection against rusting, if the coating peels off or becomes damaged, it exposes the iron underneath, making it susceptible to rusting. So, the statement is not entirely correct.
JEE - 2024
CHXII03:ELECTROCHEMISTRY
329949
Iron rod is immersed in KCl solution such that half its length is exposed to air and the other half immersed in KCl solution. The part corroded is
1 Part of the rod exposed to air
2 Part of the rod immersed in KCl solution
3 Both (1) & (2)
4 None of these
Explanation:
Due to oxidation of iron.
CHXII03:ELECTROCHEMISTRY
329950
Which of the following statements is not correct about rusting of iron?
1 Dissolved acidic oxides \({\mathrm{\mathrm{SO}_{2}, \mathrm{NO}_{2}}}\) in water act as catalyst in the process of rusting.
2 Coating of iron surface by tin prevents rusting, even if the tin coating is peeling off.
3 When pH lies above 9 or 10 , rusting of iron does not take place.
4 Rusting of iron is envisaged as setting up of electrochemical cell on the surface of iron object.
Explanation:
Rusting of iron speeds up in presence of acidic solution i.e., at lower pH . When tin coating is peeled off of the iron beneath the tin is exposed which lead to initiation of rusting. So, the correct option is (2).
Corrosion is an example of electrochemical change.
CHXII03:ELECTROCHEMISTRY
329948
Which of the following statements is not correct about rusting of iron?
1 Dissolved acidic oxides \(\mathrm{SO}_{2}, \mathrm{NO}_{2}\) in water act as catalyst in the process of rusting.
2 When \(\mathrm{pH}\) lies above 9 or 10 , rusting of iron does not take place.
3 Coating of iron surface by tin prevents rusting, even if the tin coating is peeling off.
4 Rusting of iron is envisaged as setting up of electrochemical cell on the surface of iron object.
Explanation:
While tin coatings can provide some protection against rusting, if the coating peels off or becomes damaged, it exposes the iron underneath, making it susceptible to rusting. So, the statement is not entirely correct.
JEE - 2024
CHXII03:ELECTROCHEMISTRY
329949
Iron rod is immersed in KCl solution such that half its length is exposed to air and the other half immersed in KCl solution. The part corroded is
1 Part of the rod exposed to air
2 Part of the rod immersed in KCl solution
3 Both (1) & (2)
4 None of these
Explanation:
Due to oxidation of iron.
CHXII03:ELECTROCHEMISTRY
329950
Which of the following statements is not correct about rusting of iron?
1 Dissolved acidic oxides \({\mathrm{\mathrm{SO}_{2}, \mathrm{NO}_{2}}}\) in water act as catalyst in the process of rusting.
2 Coating of iron surface by tin prevents rusting, even if the tin coating is peeling off.
3 When pH lies above 9 or 10 , rusting of iron does not take place.
4 Rusting of iron is envisaged as setting up of electrochemical cell on the surface of iron object.
Explanation:
Rusting of iron speeds up in presence of acidic solution i.e., at lower pH . When tin coating is peeled off of the iron beneath the tin is exposed which lead to initiation of rusting. So, the correct option is (2).
Corrosion is an example of electrochemical change.
CHXII03:ELECTROCHEMISTRY
329948
Which of the following statements is not correct about rusting of iron?
1 Dissolved acidic oxides \(\mathrm{SO}_{2}, \mathrm{NO}_{2}\) in water act as catalyst in the process of rusting.
2 When \(\mathrm{pH}\) lies above 9 or 10 , rusting of iron does not take place.
3 Coating of iron surface by tin prevents rusting, even if the tin coating is peeling off.
4 Rusting of iron is envisaged as setting up of electrochemical cell on the surface of iron object.
Explanation:
While tin coatings can provide some protection against rusting, if the coating peels off or becomes damaged, it exposes the iron underneath, making it susceptible to rusting. So, the statement is not entirely correct.
JEE - 2024
CHXII03:ELECTROCHEMISTRY
329949
Iron rod is immersed in KCl solution such that half its length is exposed to air and the other half immersed in KCl solution. The part corroded is
1 Part of the rod exposed to air
2 Part of the rod immersed in KCl solution
3 Both (1) & (2)
4 None of these
Explanation:
Due to oxidation of iron.
CHXII03:ELECTROCHEMISTRY
329950
Which of the following statements is not correct about rusting of iron?
1 Dissolved acidic oxides \({\mathrm{\mathrm{SO}_{2}, \mathrm{NO}_{2}}}\) in water act as catalyst in the process of rusting.
2 Coating of iron surface by tin prevents rusting, even if the tin coating is peeling off.
3 When pH lies above 9 or 10 , rusting of iron does not take place.
4 Rusting of iron is envisaged as setting up of electrochemical cell on the surface of iron object.
Explanation:
Rusting of iron speeds up in presence of acidic solution i.e., at lower pH . When tin coating is peeled off of the iron beneath the tin is exposed which lead to initiation of rusting. So, the correct option is (2).
