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प्रश्न
Give one chemical test to distinguish between the following pair of compounds.
Ethylamine and aniline
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उत्तर
Ethylamine is a primary aliphatic amine, while aniline is a primary aromatic amine. They can be differentiated by azo dye test.
Azo dye test: In this, aromatic primary amine reacts with HNO2 (NaNO2 + dil. HCl) at 273 – 278 K and then reacts with alkaline solution of 2-naphthol (β-naphthol) to give a deep yellow, orange or red colored dye.
Aliphatic primary amines under the above conditions rapidly release nitrogen gas with the formation of primary alcohols, i.e., the solution remains transparent.
\[\ce{\underset{Ethylamine}{C2H5NH2} + HONO ->[273 - 278 K] \underset{ethyl alcohol}{C2H5OH} + H2O + N2 ^}\]
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संबंधित प्रश्न
Convert aniline into 1, 3, 5-tribromobenzene.
Write the IUPAC name of the following compound and classify it as primary, secondary and tertiary amine.
CH3(CH2)2NH2
Write the IUPAC name of the following compound and classify it as primary, secondary and tertiary amine.
(CH3CH2)2NCH3
Give one chemical test to distinguish between the following pair of compounds.
Methylamine and dimethylamine
Account for the following:
Ethylamine is soluble in water, whereas aniline is not.
How will you convert methanol to ethanoic acid?
How will you convert ethanoic acid into propanoic acid?
How will you convert methanamine into ethanamine?
How will you convert nitromethane into dimethylamine?
Accomplish the following conversion:
Aniline to 2, 4, 6-tribromofluorobenzene
An aromatic compound ‘A’ on treatment with aqueous ammonia and heating forms compound ‘B’ which on heating with Br2 and KOH forms a compound ‘C’ of molecular formula C6H7N. Write the structures and IUPAC names of compounds A, B and C.
Using IUPAC norms, write the formula of Hexaamminecobalt(III) sulphate.
The following amine is called as:
Do the following conversions in not more than two steps:
\[\begin{array}{cc}
\ce{CH3CN to CH3 - C - CH3}\\
\phantom{...........}||\\
\phantom{...........}\ce{O}
\end{array}\]
Do the following conversions in not more than two steps:
