Question

Write the chromogen, chromophore and auxchrome present in para hydroxy azo benzene.

Answer 1

Structure of para hydroxy azo benzene-

$HO-C_6{H}_4-N=N-C_6{H}_5$

In the following structure,

• Chromogen is reresented as-

$\underset{\left(\text{Azo benzene}\right)}{C_6{H}_5-N=N-C_6{H}_5}$

• Chromophore is reresented as-

$\underset{\left(\text{Diazo}\right)}{-N=N-}$

• Auxochrome is reresented as-

$\underset{\left(\text{Hydroxy}\right)}{-OH}$