In West-Gaeke colourimetric procedure, the intensity of the red purple – McqOptions

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1.	In West-Gaeke colourimetric procedure, the intensity of the red purple colour is measured photometically and it is proportional to the concentration of sulphur di-oxide. What is the red purple coloured compound?
A.	Sodium tetra chloromercurate
B.	Dicholorosulphitomercurate complex
C.	Ammonia molybdate
D.	Paraosaniline sulphonic acid
Answer» B. Dicholorosulphitomercurate complex

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