Assertion: On cooling, the brown colour of nitrogen dioxide disappears. Reason: On cooling, `NO_(2)` undergoes dimerisation resulting in the pairing of the odd electron in `NO_(2)`.A. If both (`A`) and (`R`) are correct and (`R`) is the correct explanation of (`A`).B. If both (`A`) and (`R`) are correct, but (`R`) is not the correct explanation of (`A`).C. If (`A`) is correct, but (`R`) is incorrect.D. If (`A`) is incorrect, but (`R`) is correct.

Assertion: On cooling, the brown colour of nitrogen dioxide disappears

1.	Assertion: On cooling, the brown colour of nitrogen dioxide disappears. Reason: On cooling, `NO_(2)` undergoes dimerisation resulting in the pairing of the odd electron in `NO_(2)`.A. If both (`A`) and (`R`) are correct and (`R`) is the correct explanation of (`A`).B. If both (`A`) and (`R`) are correct, but (`R`) is not the correct explanation of (`A`).C. If (`A`) is correct, but (`R`) is incorrect.D. If (`A`) is incorrect, but (`R`) is correct.
Answer» Correct Answer - A::B::C::D `underset((Brown colour))(NO_(2)+NO_(2)) hArrunderset((Colourless))(N_(2)O_(4))`

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