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  4. Which of the following is an artificial edible colour ?

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Q. Which of the following is an artificial edible colour ?

BITSATBITSAT 2011

Solution:

Tetrazine is an artificial edible colour. It is an unstable compound that contains a $6$-membered aromatic ring, $4$ of which are nitrogen atoms.
The formula of tetrazine is $C _{2} H _{2} N _{4}$.