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प्रश्न
Account for the following:
Methylamine in water reacts with ferric chloride to precipitate hydrated ferric oxide.
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उत्तर
Due to the +I effect of −CH3 group, methylamine is more basic than water. Therefore, in water, methylamine produces OH− ions by accepting H+ ions from water.
\[\ce{CH3-NH2 + H-OH -> H3N+-CH3 + OH-}\]
Ferric chloride (FeCl3) dissociates in water to form Fe3+ and Cl− ions.
Then, OH− ion reacts with Fe3+ ion to form a precipitate of hydrated ferric oxide.
\[\ce{FeCl3 -> Fe^{3+} + 3Cl^-}\]
\[\ce{2Fe^{3+} + 6OH^- -> \underset{(Brown precipitate)}{Fe2O3.3H2O}}\]
संबंधित प्रश्न
Which among the following molecular formulae represents urotropine?
(a) C6H12N4
(b) C6H24H4
(c) C6H12N4O2
(d) C6H24N4O2
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.
C6H5NHCH3
Write the IUPAC name of the following compound and classify it as primary, secondary and tertiary amine.
m−BrC6H4NH2
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.
Secondary and tertiary amines
Give one chemical test to distinguish between the following pair of compounds.
Aniline and benzylamine
Account for the following:
pKb of aniline is more than that of methylamine.
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
Accomplish the following conversion:
Chlorobenzene to p-chloroaniline
Do the following conversions in not more than two steps :
Ethyl benzene to Benzoic acid
Write the structure of 2,4-dinitrochlorobenzene
Identify the incorrect IUPAC name.
Do the following conversions in not more than two steps:
\[\begin{array}{cc}
\ce{CH3CN to CH3 - C - CH3}\\
\phantom{...........}||\\
\phantom{...........}\ce{O}
\end{array}\]
Predict the product 'A' in the following reaction.
\[\ce{\underset{(Acetyl chloride)}{CH3COCl}->[H2][Pd-BaSO4]A + HCl}\]
