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प्रश्न
Give one chemical test to distinguish between the following pair of compounds.
Ethylamine and aniline
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
Write the IUPAC name of the following compound and classify it as primary, secondary and tertiary amine.
(CH3)2CHNH2
Write the IUPAC name of the following compound and classify it as primary, secondary and tertiary amine.
CH3NHCH(CH3)2
Write the IUPAC name of the following compound and classify it as primary, secondary and tertiary amine.
C6H5NHCH3
Write the IUPAC name of the following compound and classify it as primary, secondary and tertiary amine.
(CH3CH2)2NCH3
Account for the following:
Ethylamine is soluble in water whereas aniline is not.
Account for the following:
Methylamine in water reacts with ferric chloride to precipitate hydrated ferric oxide.
How will you convert hexanenitrile into 1-aminopentane?
How will you convert methanol to ethanoic acid?
How will you convert nitromethane into dimethylamine?
Accomplish the following conversion:
Aniline to 2, 4, 6-tribromofluorobenzene
Complete the following reactions:
`C_6H_5N_2Cl +C_2H_5OH->`
Give reasons Although –NH2 is o/p directing group, yet aniline on nitration gives a significant amount of m-nitroaniline
Do the following conversions in not more than two steps :
Ethyl benzene to Benzoic acid
Do the following conversions in not more than two steps :
Propanone to Propene
How are ethylamine and ethyl methyl amine distinguished by using nitrous acid?
Using IUPAC norms write the formula of Hexaamminecobalt (III) sulphate.
Identify the incorrect IUPAC name.
An organic compound (A) with molecular formula C3H7NO on heating with Br2 and KOH forms a compound (B). Compound (B) on heating with CHCl3 and alcoholic KOH produces a foul-smelling compound (C) and on reacting with C6H5SO2Cl forms a compound (D) which is soluble in alkali. Write the structure of (A), (B), (C) and (D).
Do the following conversions in not more than two steps:
Predict the product 'A' in the following reaction.
\[\ce{\underset{(Acetyl chloride)}{CH3COCl}->[H2][Pd-BaSO4]A + HCl}\]
