In the following experimental setup of electrolysis of water, if P and Q are the gases collected in the test tubes enclosing the electrodes R and S, then select the option/options in which the matching is correct: (i) P-Oxygen gas R-Anode (ii) P-Hydrogen gas R-Cathode (iii) Q-Hydrogen gas S-Cathode (iv) Q-Oxygen gas S-Anode
In the following experimental setup of electrolysis of water, if P and Q are the gases collected in the test tubes enclosing the electrodes R and S, then select the option/options in which the matching is correct: (i) P-Oxygen gas R-Anode (ii) P-Hydrogen gas R-Cathode (iii) Q-Hydrogen gas S-Cathode (iv) Q-Oxygen gas S-Anode
Options
Official answer
The correct option is (B) (iii) and (iv).
Marking scheme
- 1.(iii) and (iv)
Hint
Remember that the cathode is where the reduction reaction occurs, and the anode is where the oxidation reaction occurs.
Quick oral answer
The electrolysis of water involves the decomposition of water into hydrogen and oxygen gases. The cathode is where the reduction reaction occurs, and the anode is where the oxidation reaction occurs. In this case, the cathode is S, and the anode is R. Therefore, the correct matching is: Q-Hydrogen gas S-Cathode and P-Oxygen gas R-Anode.
Common mistakes
- 1.Confusing the cathode and anode
- 2.Not understanding the electrolysis process
Analysis and explanation
The electrolysis of water involves the decomposition of water into hydrogen and oxygen gases. The cathode is where the reduction reaction occurs, and the anode is where the oxidation reaction occurs. In this case, the cathode is S, and the anode is R. Therefore, the correct matching is: Q-Hydrogen gas S-Cathode and P-Oxygen gas R-Anode.
Interesting facts
Electrolysis is a process used to split water into hydrogen and oxygen gases.
The electrolysis of water is an important process in many industrial applications.
Question details
Q1 of 39 questions
- Board
- CBSE
- Class
- Class 10
- Subject
- Science
- Year
- 2025
- Section
- Section A
- Marks
- 1
- Type
- MCQ
- Chapter
- Chemical Reactions and Equations
- Topic
- Electrolysis of Water
- Bloom's level
- Comprehension
- Syllabus topic
- Electrolysis
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Frequently asked questions
How many marks does this question carry in CBSE Class 10 Science 2025?
This question carries 1 mark in the CBSE Class 10 Science 2025 examination.
Which chapter does this question come from in Science?
This question is from the chapter "Chemical Reactions and Equations" in the CBSE Class 10 Science syllabus.
What topic does this question cover in Science?
This question covers the topic "Electrolysis of Water" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2025 paper?
This is a MCQ question from Section A in the CBSE Class 10 Science 2025 paper.