Class 12 Exam > Class 12 Questions > Rusting of iron or corrosion of active metal ...
Start Learning for Free
Rusting of iron or corrosion of active metal is initiated by
- a)cathodic reaction, when oxygen gas which is dissolved in H2O, is reduced to OH-
- b)acid rain which oxidises metal to metal ion
- c)Both (a) and (b)
- d)None of the above
Correct answer is option 'C'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
Rusting of iron or corrosion of active metal is initiated bya)cathodic...
Acid rain causes corrosion of metals. Even Cu, Ag and Pb are corroded.
Most Upvoted Answer
Rusting of iron or corrosion of active metal is initiated bya)cathodic...
Explanation:
Rusting of iron or corrosion of active metal is a process that occurs when metal comes in contact with oxygen and water. It involves the oxidation of the metal, where metal atoms lose electrons and form metal ions. This process is initiated by both a cathodic reaction and acid rain.
a) Cathodic reaction: When iron comes in contact with water, oxygen gas (O2) which is dissolved in water acts as an oxidizing agent. The oxygen gas is reduced at the cathodic site on the metal surface, where it gains electrons and forms hydroxide ions (OH-). This cathodic reaction can be represented by the following equation:
O2 + 2H2O + 4e- -> 4OH-
b) Acid rain: Acid rain is a form of precipitation that contains high levels of acids, such as sulfuric acid and nitric acid. When acid rain comes in contact with active metal, it acts as an oxidizing agent and oxidizes the metal to form metal ions. This process can be represented by the following equation:
M + 2H+ -> M2+ + H2
where M represents the metal.
c) Both (a) and (b): The rusting of iron or corrosion of active metal is initiated by both the cathodic reaction and acid rain. The oxygen gas dissolved in water acts as an oxidizing agent and reduces to hydroxide ions, while acid rain acts as an oxidizing agent and oxidizes the metal to metal ions. Therefore, both the cathodic reaction and acid rain play a role in the initiation of rusting or corrosion.
d) None of the above: This option is incorrect because both the cathodic reaction and acid rain are involved in the initiation of rusting or corrosion.
In conclusion, the correct answer is option (c) - both the cathodic reaction and acid rain initiate the rusting of iron or corrosion of active metal.
Rusting of iron or corrosion of active metal is a process that occurs when metal comes in contact with oxygen and water. It involves the oxidation of the metal, where metal atoms lose electrons and form metal ions. This process is initiated by both a cathodic reaction and acid rain.
a) Cathodic reaction: When iron comes in contact with water, oxygen gas (O2) which is dissolved in water acts as an oxidizing agent. The oxygen gas is reduced at the cathodic site on the metal surface, where it gains electrons and forms hydroxide ions (OH-). This cathodic reaction can be represented by the following equation:
O2 + 2H2O + 4e- -> 4OH-
b) Acid rain: Acid rain is a form of precipitation that contains high levels of acids, such as sulfuric acid and nitric acid. When acid rain comes in contact with active metal, it acts as an oxidizing agent and oxidizes the metal to form metal ions. This process can be represented by the following equation:
M + 2H+ -> M2+ + H2
where M represents the metal.
c) Both (a) and (b): The rusting of iron or corrosion of active metal is initiated by both the cathodic reaction and acid rain. The oxygen gas dissolved in water acts as an oxidizing agent and reduces to hydroxide ions, while acid rain acts as an oxidizing agent and oxidizes the metal to metal ions. Therefore, both the cathodic reaction and acid rain play a role in the initiation of rusting or corrosion.
d) None of the above: This option is incorrect because both the cathodic reaction and acid rain are involved in the initiation of rusting or corrosion.
In conclusion, the correct answer is option (c) - both the cathodic reaction and acid rain initiate the rusting of iron or corrosion of active metal.
|
Explore Courses for Class 12 exam
|
|
Rusting of iron or corrosion of active metal is initiated bya)cathodic reaction, when oxygen gas which is dissolved in H2O, is reduced to OH-b)acid rain which oxidises metal to metal ionc)Both (a) and (b)d)None of the aboveCorrect answer is option 'C'. Can you explain this answer?
Question Description
Rusting of iron or corrosion of active metal is initiated bya)cathodic reaction, when oxygen gas which is dissolved in H2O, is reduced to OH-b)acid rain which oxidises metal to metal ionc)Both (a) and (b)d)None of the aboveCorrect answer is option 'C'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Rusting of iron or corrosion of active metal is initiated bya)cathodic reaction, when oxygen gas which is dissolved in H2O, is reduced to OH-b)acid rain which oxidises metal to metal ionc)Both (a) and (b)d)None of the aboveCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Rusting of iron or corrosion of active metal is initiated bya)cathodic reaction, when oxygen gas which is dissolved in H2O, is reduced to OH-b)acid rain which oxidises metal to metal ionc)Both (a) and (b)d)None of the aboveCorrect answer is option 'C'. Can you explain this answer?.
Rusting of iron or corrosion of active metal is initiated bya)cathodic reaction, when oxygen gas which is dissolved in H2O, is reduced to OH-b)acid rain which oxidises metal to metal ionc)Both (a) and (b)d)None of the aboveCorrect answer is option 'C'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Rusting of iron or corrosion of active metal is initiated bya)cathodic reaction, when oxygen gas which is dissolved in H2O, is reduced to OH-b)acid rain which oxidises metal to metal ionc)Both (a) and (b)d)None of the aboveCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Rusting of iron or corrosion of active metal is initiated bya)cathodic reaction, when oxygen gas which is dissolved in H2O, is reduced to OH-b)acid rain which oxidises metal to metal ionc)Both (a) and (b)d)None of the aboveCorrect answer is option 'C'. Can you explain this answer?.
Solutions for Rusting of iron or corrosion of active metal is initiated bya)cathodic reaction, when oxygen gas which is dissolved in H2O, is reduced to OH-b)acid rain which oxidises metal to metal ionc)Both (a) and (b)d)None of the aboveCorrect answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12.
Download more important topics, notes, lectures and mock test series for Class 12 Exam by signing up for free.
Here you can find the meaning of Rusting of iron or corrosion of active metal is initiated bya)cathodic reaction, when oxygen gas which is dissolved in H2O, is reduced to OH-b)acid rain which oxidises metal to metal ionc)Both (a) and (b)d)None of the aboveCorrect answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Rusting of iron or corrosion of active metal is initiated bya)cathodic reaction, when oxygen gas which is dissolved in H2O, is reduced to OH-b)acid rain which oxidises metal to metal ionc)Both (a) and (b)d)None of the aboveCorrect answer is option 'C'. Can you explain this answer?, a detailed solution for Rusting of iron or corrosion of active metal is initiated bya)cathodic reaction, when oxygen gas which is dissolved in H2O, is reduced to OH-b)acid rain which oxidises metal to metal ionc)Both (a) and (b)d)None of the aboveCorrect answer is option 'C'. Can you explain this answer? has been provided alongside types of Rusting of iron or corrosion of active metal is initiated bya)cathodic reaction, when oxygen gas which is dissolved in H2O, is reduced to OH-b)acid rain which oxidises metal to metal ionc)Both (a) and (b)d)None of the aboveCorrect answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Rusting of iron or corrosion of active metal is initiated bya)cathodic reaction, when oxygen gas which is dissolved in H2O, is reduced to OH-b)acid rain which oxidises metal to metal ionc)Both (a) and (b)d)None of the aboveCorrect answer is option 'C'. Can you explain this answer? tests, examples and also practice Class 12 tests.
|
|
Explore Courses for Class 12 exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup