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Class 12 Exam  >  Class 12 Questions  >   Directions: In the following questions, A st... Start Learning for Free
Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.
Assertion (A): Ecell should have a positive value for the cell to function.
Reason (R): Ecathode < />anode.
  • a)
    Both A and R are true and R is the correct explanation of A
  • b)
    Both A and R are true but R is NOT the correct explanation of A
  • c)
    A is true but R is false
  • d)
    A is false and R is True
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
Directions: In the following questions, A statement of Assertion (A) ...
Assertion (A): Ecell should have a positive value for the cell to function.
Reason (R): Ecathode anode.

The correct answer is option 'C', which means assertion A is true but reason R is false.

Explanation:

- Assertion (A): Ecell should have a positive value for the cell to function.
- This statement is true. Ecell refers to the cell potential or electromotive force (EMF) of a cell. It is a measure of the voltage difference between the cathode and anode of a cell. For a cell to function properly, the Ecell should have a positive value. A positive Ecell indicates that the cell is capable of driving an electric current in an external circuit.

- Reason (R): Ecathode anode.
- This statement is false. The reason given for the assertion is incorrect. Ecathode and anode are not related to each other in terms of their electrical potential. The cathode and anode are the two electrodes of a cell where the oxidation and reduction reactions occur, respectively. The cathode is the electrode where reduction occurs, while the anode is the electrode where oxidation occurs. The potential difference between the cathode and anode contributes to the Ecell, but it does not determine whether the Ecell is positive or negative.

To summarize:
- Assertion A is true because a positive Ecell is required for the proper functioning of a cell.
- Reason R is false because the relationship between Ecathode and anode does not determine the sign of Ecell.

Hence, option 'C' is the correct answer.
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Community Answer
Directions: In the following questions, A statement of Assertion (A) ...
Ecell = Ecathode – Eanode.
To have a positive value of Ecell, Ecathode should be greater than Eanode.
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Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): Ecell should have a positive value for the cell to function.Reason (R): Ecathode anode.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is TrueCorrect answer is option 'C'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): Ecell should have a positive value for the cell to function.Reason (R): Ecathode anode.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is TrueCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): Ecell should have a positive value for the cell to function.Reason (R): Ecathode anode.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is TrueCorrect answer is option 'C'. Can you explain this answer?.
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