What colour is obtained by the pyrolytic vapours of butyl rubber on the filter paper freshly soaked in a solution obtained by dissolving yellow mercuric oxide in conc. sulphuric acid and water on boiling?

What colour is obtained by the pyrolytic vapours of butyl rubber on th

1.	What colour is obtained by the pyrolytic vapours of butyl rubber on the filter paper freshly soaked in a solution obtained by dissolving yellow mercuric oxide in conc. sulphuric acid and water on boiling?
A.	bright yellow
B.	grey
C.	blue
D.	brown-yellow
Answer» B. grey

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What colour is obtained by the pyrolytic vapours of butyl rubber on the filter paper freshly soaked in a solution obtained by dissolving yellow mercuric oxide in conc. sulphuric acid and water on boiling?

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