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Methy1 orange an acid-base indicator is ...

Methy1 orange an acid-base indicator is prepared by diazo coupling reaction of `N,N` dimethylaniline with

A

sulphanilic acid

B

orthanilic acid

C

metanilic acid

D

picric acid

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Verified by Experts

The correct Answer is:
A
At`pH gt 4.4(A)` exits as the yellow coloured free base (as it absorbs violet light) `At pH lt 3` it is red (due to absorption of green) due to formatin of (B) through protonation of a azo N and subsequent delocalization

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R SHARMA-AMINES-Follow -up Test
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  2. When diethylamine is oxidized by KMnO(4) the product is .

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  3. Which of the following does not oxidise a tertiary amine to the amine ...

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  4. Tertiary amine oxides undergo the elimination of a dialkyihydroxylamin...

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  5. Aniline is oxidized by peroxytrifluoro acetic acid in methy1ene dichlo...

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  6. Predict the product of the following reaction C(6)H(5)MgBr+CH(3)NH(2...

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  7. Butan-1 amine reacts with nitrous acid at 0.^(@)C to form .

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  8. Which one of the following compounds will produce a water insoluble ye...

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  9. Which of the following amines undergo Liebermann s nitroso reaction ?

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  10. The presence of a primary amine can be confirmed by its reaction with ...

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  11. Which of the following is known as Hinsberg reagent ?

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  12. Consider the following sequence of reactions NO(2) The end product ...

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  13. Consider the reaction The name of the reactions and the intermediate v...

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  14. Consider the following sequence of reactions .

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  15. In the chemical reactions the compounds (A) and (B) are .

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  16. Predict the final product of the following sequence of reactions

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  17. Benzenediazonium chloride does not react with .

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  18. Which of the following conditions is most satisfactory for diazo coupl...

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  19. Methy1 orange an acid-base indicator is prepared by diazo coupling rea...

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  20. Among the diazonium ions the order of reactivity towards diazocoupling...

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