Chemistry - Complete P-block Question with Solution | TestHub

Question Explanation:

Identify the correct property of the gas evolved when galena $(\mathrm{PbS})$ is treated with concentrated ${\mathrm{HNO}}_3$.

Concept:

Reaction of Metal Sulfides with concentrated ${\mathrm{HNO}}_3$.

Solution:

Galena ( PbS ) reacts with hot concentrated ${\mathrm{HNO}}_3$ : $3\mathrm{PbS}+8{\mathrm{HNO}}_3\to 3\mathrm{Pb}{\left({\mathrm{NO}}_3\right)}_2+2\mathrm{NO}+4{\mathrm{H}}_2\mathrm{O}+\mathrm{S}$

NO ⇒ Neutral oxide, Paramagnetic, Linear geometry, Colourless gas

Final Answer: paramagnetic, Colourless gas