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.
A. lead acetate
B. methyl orange
C. phenolphthalein
D. ammonium hydroxide
Answer: Option A
This Question Belongs to Metallurgical Engineering >> Metallurgical Analysis
Related Questions on Metallurgical Analysis
A. combustion
B. gravimetric
C. volumetric
D. both B and C
Temperature used in the determination of volatile matter of coal is . . . . . . . . °C.
A. 750
B. 850
C. 950
D. 1050
Join The Discussion