Advertisements
Advertisements
प्रश्न
Give one chemical test to distinguish between the following pair of compounds.
Aniline and benzylamine
Advertisements
उत्तर
Aniline and benzylamine can be distinguished by their reactions with the help of nitrous acid, which is prepared in situ from a mineral acid and sodium nitrite. Benzylamine reacts with nitrous acid to form unstable diazonium salt, which in turn gives alcohol with the evolution of nitrogen gas.
\[\ce{\underset{Benzylamine}{C6H5CH2 - NH2} + HNO2 ->[NaNO2 + HCl] \underset{(Unstable)}{[C6H5CH2 - \overset{+}{N2}C\overset{-}{l}]} ->[H2O] N2 ^ + \underset{Benzy alcohol}{C6H5CH2 - OH} + HCl}\]
On the other hand, aniline reacts with HNO2 at a low temperature to form stable diazonium salt. Thus, nitrogen gas is not evolved.
\[\ce{C6H5NH2 ->[NaNO2 + HCl][273 - 278 K] C6H5 - \overset{+}{N2}C\overset{-}{l} + NaCl + 2H2O}\]
APPEARS IN
संबंधित प्रश्न
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.
CH3NHCH(CH3)2
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 methanol to ethanoic acid?
Accomplish the following conversion:
Chlorobenzene to p-chloroaniline
Accomplish the following conversion:
Aniline to benzyl alcohol
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 reaction:
\[\ce{C6H5NH2 + H2SO4 (conc.)}\]
Complete the following reaction:
\[\ce{C6H5N2Cl + C2H5OH ->}\]
Do the following conversions in not more than two steps :
Ethyl benzene to Benzoic acid
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
Using IUPAC norms, write the formula of Hexaamminecobalt(III) sulphate.
The following amine is called as:
Predict the product 'A' in the following reaction.
\[\ce{\underset{(Acetyl chloride)}{CH3COCl}->[H2][Pd-BaSO4]A + HCl}\]
