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Give reasons for the following : (i) NO (Nitric oxide) is paramagnetic in the gaseous state but diamagnetic in the liquid and solid states. Why? (ii) Nitric oxide becomes brown when released in air. |
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Answer» Solution :(i) NO has an odd number of electrons (7 + 8 = 15 electrons) and HENCE is paramagnetic in the gaseous state. But in liquid and solid states, it exists as a dimer and hence is diamagnetic in these states. (ii) Nitric oxide has one UNPAIRED electron and hence is very reactive. As a RESULT, it readily combines with `O_(2)` of the air to form nitrogen dioxide `(NO_(2))` which has brown colour. `underset(("Colourless"))(2NO) + O_(2) rarr underset(("Brown"))(2NO_(2))` |
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