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Dyes - Color, Structure and Characteristics

Which among t...

Question

Which among the following is a chromophore of azo dyes?

C H_{3} - C | | {C H}_{2} - C H_{3}

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- N O

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- N = N -

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- N O_{2}

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Solution

The correct option is C $- N = N -$
Chromophore is part of molecule responsible for its colour. For azo dyes , the general formula is $R - N = N - R^{'}$ and the chromophore is the azo group( - $N = N$ - ).

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