Advertisements
Advertisements
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.
\[\ce{\underset{Ethylamine}{C2H5NH2} + HONO ->[273 - 278 K] \underset{ethyl alcohol}{C2H5OH} + H2O + N2 ^}\]
APPEARS IN
संबंधित प्रश्न
Which among the following molecular formulae represents urotropine?
(a) C6H12N4
(b) C6H24H4
(c) C6H12N4O2
(d) C6H24N4O2
Convert 3-Methylaniline into 3-nitrotoluene.
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)2CHNH2
Give one chemical test to distinguish between the following pair of compounds.
Methylamine and dimethylamine
Give one chemical test to distinguish between the following pair of compounds.
Aniline and N-methylaniline
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 ethanoic acid into methanamine?
How will you convert methanol to ethanoic acid?
How will you convert propanoic acid into ethanoic acid?
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.
Complete the following reactions:
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 :
Propanone to Propene
What is the action of p-toluenesulphonychloride on ethylamine and diethylamine?
Give simple chemical tests to distinguish between the following pair of compounds:
Benzaldehyde and Benzoic acid
The following amine is called as:
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).
