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Give reason: Aniline gets coloured on s...

Give reason: Aniline gets coloured on standing in air for a long time.

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Due to strong electron-donating effect (+R-effect) of the `NH_(2)` group, the electron density ono the benzene ring increases. As a result, aniline is easily oxidised on standing in air for a long time to form coloured blackish brown products.
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PRADEEP-ORGANIC COMPOUNDS CONTAINING NITROGEN-ADDITIONAL QUESTIONS (VERY SHORT ANSWER QUESTIONS)
  1. Electrophilic substitution in case of aromatic amines takes place more...

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  2. Direct nitration of aniline is not carried out. Explain.

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  3. Give reason: Aniline gets coloured on standing in air for a long time...

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  4. Which of the following exists as a zwitterion?

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  5. Mention two important uses of sulphanilic acid.

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  6. Statement 1: Primary, secondary and tertiary amines can be separated b...

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  7. Compound A (C(3)H(9)N) reacts with benzene sulphonyl chloride to form ...

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  8. Metntion the chief use of quaternary ammonium salts derived from long ...

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  9. What is diazotisation

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  10. Write the structure of benzenediazonium chloride?

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  11. Why are benzenediazonium salts soluble in water?

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  12. What is Sandmeyer reaction?

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  13. (a) Explain why an alkylamine is more basic than ammonia? (b) How wo...

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  14. Explain the following reactions by giving one example : (i) Carbylam...

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  15. What are the reaction involved in the reductive removal of nitro group...

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  16. How will you convert aniline into nitrobenzene without the intermediac...

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  17. What is a coupling reaction?

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  18. What product is formed when aniline is first diazotised and then react...

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  19. Give an example of Gomberg reaction.

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  20. How is phenylhydrazine prepared from aniline?

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