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Qualitative determination of H2S in gases is done by wetting a...

This question belongs to Metallurgical Engineering Metallurgical Analysis
Metallurgical Analysis
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Qualitative determination of H2S in gases is done by wetting a filter paper with . . . . . . . . and keeping it in the gas stream. The extent of brown or black colouration of the filter paper givesa rough estimate of H2S present in the gas.

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Correct Answer: Option A
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