A pink coloured dye complex is formed when air containing NO2 is passed in an absorbing solution consisting of __________ and diamine dissolved in acetic acid medium.
A. Sulphuric acid
B. Sulphonyl
C. Sulphonic acid
D. Sulphanilic acid
Answer:D
A pink coloured dye complex is formed when air containing NO2 is passed in an absorbing solution consisting of __________ and diamine dissolved in acetic acid medium.
A. Sulphuric acid B. Sulphonyl C. Sulphonic acid D. Sulphanilic acid