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  4. The treatment of galena with HNO 3 produces a gas that is

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Q. The treatment of galena with $HNO _3$ produces a gas that is

JEE AdvancedJEE Advanced 2022

Solution:

$ 3 PbS +8 HNO _3 \rightarrow 3 Pb \left( NO _3\right)_2+2 NO +4 H _2 O + S $
$NO \Rightarrow$ Neutral oxide, Paramagnetic, Linear geometry, Colourless gas