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Science · 2025 · 1 mark
CBSE 2025 · Region 6 · Set 1 · Q1
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,…
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
Official answer
(C)
(i) and (iii)
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CBSE Class 10 Science past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.