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NO(2) and N(2)O(4) are two forms of nitr...

`NO_(2)` and `N_(2)O_(4)` are two forms of nitrogen dioxide. One exists in gaseous state while other in liquid state. The nature of `NO_(2)` and `N_(2)O_(4)` forms are

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`NO_(2)` is paramagnetic and is reactive due to the presence of unpaired electron. `N_(2)O_(4)`is the dimer of `NO_(2)` which has no unpaired electron. It is diamagnetic.
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