Which oxide becomes brown when exposed to air give reason?
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(i) Nitric oxide combines with oxygen when exposed to air to give nitrogen dioxide which is brown in colour.
(ii) Bi has little tendency to form pentahalides because + 5 oxidation state of Bi is much less stable than + 3 oxidation state due to inert pair effect.
(ii) Bi has little tendency to form pentahalides because + 5 oxidation state of Bi is much less stable than + 3 oxidation state due to inert pair effect.
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