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Practical Work — CHEMISTRY STD 9 — Question

ICSE BoardEnglish MediumSTD 9CHEMISTRYPractical Work2 Marks
Question
What do you observe when $H_2S$ is passed through a lead nitrate solution.
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Answer

When gas is passed to lead nitrate solution it also turns black.
$\underset{\text { (colourless) }}{\mathrm{Pb}\left(\mathrm{NO}_3\right)_2}+\mathrm{H}_2 \mathrm{~S} \longrightarrow \underset{\text { (Black) }}{\mathrm{PbS}}+2 \mathrm{HNO}_3$

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