Synthetic Dyes

Q. 25 How to balance the equation through half reaction method

Q. Aniline when diazotized in cold and then treated with dimethyl aniline gives a coloured product. Its structure would be.

1. 
2. 
3. 
4. 

Q. Which of the following would react with benzenediazonium chloride under basic conditions to form azo dyes?

1. 
2. 
3. 
4. 

Q. K_2C_2O_7+H_2SO_4+SO_2→ K_2SO_4+Cr_2(S0_4)_3+H_2O Balance the equation.

Q.

Benzenediazonium chloride when treated with phenols gives azo dyes, to get best result the pH of the medium should be

1. Around 4

2. Around 8

3. Around 10

4. 12

Q.
The product B is:

1. 
2. 
3. 
4. 

Q. In the following reactions, the major product W is

1. 
2. 
3. 
4.