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Section D (Assertion-Reason)
The following questions consist of two statements. Mark the answer as follows.
(a) If both statements are CORRECT, and Statement
II is the CORRECT explanation of Statement I.
(b) If both statements are CORRECT, and Statement II is NOT the CORRECT explanation of Statement I.
(c) If Statement I is CORRECT, but Statement II is INCORRECT.
(d) If Statement I is INCORRECT, but Statement II is CORRECT.

Statement I: The system \( \mathrm{N}_{2} \mathrm{O}_{4}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NO}_{2}(\mathrm{~g}) \) is said to be at equilibrium when the intensity of brown colour does not change with time.
Statement II: \( \mathrm{N}_{2} \mathrm{O}_{4}(\mathrm{~g}) \) is colourless while \( \mathrm{NO}_{2}(\mathrm{~g}) \) is coloured.
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