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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
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
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.
m−BrC6H4NH2
Give one chemical test to distinguish between the following pair of compounds.
Ethylamine and aniline
How will you convert methanol to ethanoic acid?
How will you convert ethanamine into methanamine?
How will you convert methanamine into ethanamine?
How will you convert nitromethane into dimethylamine?
Complete the following reaction:
\[\ce{C6H5NH2 + Br2 (aq) ->}\]
How are ethylamine and ethyl methyl amine distinguished by using nitrous acid?
Give simple chemical tests to distinguish between the following pair of compounds:
Benzaldehyde and Benzoic acid
The following amine is called as:
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:
