Thank you for reporting, we will resolve it shortly
Q.
Which of the following is not a chromophore
NTA AbhyasNTA Abhyas 2022
Solution:
A dye molecule is made up of two different part (i) Chromophore (ii) Auxochrome. The groups which produce colour in a compound i.e., chromophores are usual unsaturated groups like nitro, nitroso, azo, azoxy, carbonyl and olefinic bonds Auxochrome are usually acidic / basic functional group like $-OH,-COOH,-SO_{3}H,-NH_{2},-NHR,-NR_{2}$ .
A compound containing only a chromophore may be coloured material but not a dye. For example azo benzene is red coloured but not a dye. Where as para amino azobenzene (anilineyellow) is a dye.
