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ICSE Class 10 Chemistry 2014 Paper

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State the inference drawn from the following observations :
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Question : 59 of 88
Marks: +1, -0
A gas QQ turns moist lead acetate paper silvery black. Identify the gas QQ.
Solution:  
Q→Q \rightarrow Hydrogen sulphide gas (H2S)(\mathrm{H}_2\mathrm{S})
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