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Topic Content:
- Laboratory Preparation of Nitrogen(IV) Oxide
Nitrogen(IV) oxide, NO2 , is a yellowish-brown liquid in its compressed form or reddish-brown gas. It is denser than air. It is a major atmospheric pollutant that absorbs ultraviolet radiation.
Laboratory Preparation of Nitrogen(IV) Oxide:
Nitrogen(IV) oxide is prepared in the laboratory by heating lead(II) trioxonitrate(V), Pb(NO3 )2 strongly. The Pb(NO3 )2 decomposes to give nitrogen(IV) oxide, PbO, and O2 .
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The gases formed are passed through a U-tube immersed in a freezing mixture. The nitrogen(IV) oxide becomes liquefied in the U-tube as
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