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  3. Chemistry
  4. Assertion On cooling, the brown colour of nitrogen dioxide disappears. Reason On cooling, NO2 undergoes dimerisation resulting in the pairing of odd electrons of NO2.

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Q. Assertion On cooling, the brown colour of nitrogen dioxide disappears.
Reason On cooling, $ NO_{2}$ undergoes dimerisation resulting in the pairing of odd electrons of $NO_{2}$.

AIIMSAIIMS 2013

Solution:

Reason is the correct explanation of Assertion