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प्रश्न
An organic compound C2H4O gives a red precipitate when heated with Fehling solution. It also undergoes aldol condensation in the presence of dilute NaOH.
- Identify the organic compound and write its IUPAC name.
- Which compound will be formed when this organic compound reacts with hydroxylamine?
- What is observed when the compound, referred to in subpart (i), is heated with ammonical silver nitrate?
उत्तर
- Reacting aliphatic aldehyde with Fehling solution produces a red cuprous oxide precipitate. As a result, acetaldehyde is the required organic component.
IUPAC Name: ethanal - Ethanal reacts with hydroxylamine to form Ethanal oxime.
\[\ce{\underset{Ethanal}{CH3CHO} + H2NOH -> \underset{Ethanal oxime}{CH3 - C = NOH} + H2O}\] - Aldehyde is oxidised to carboxylic acid. Silver reduces into metal, resulting in a silver mirror, indicating that the chemical is Aldehyde.
\[\begin{array}{cc}
\ce{O}\phantom{................................................................................}\\
||\phantom{................................................................................}\\
\ce{CH3 - C - H + 2[Ag(NH3)2]NO3 + 2NH4OH ->2NH4NO3 + \underset{Silver mirror}{RCOOH + 2Ag↓ + H2O} + 4NH3}
\end{array}\]
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संबंधित प्रश्न
An organic compound A with molecular formula C2H7N on reaction with nitrous acid gives a compound B. Bon controlled oxidation gives compound C. C reduces Tollen's -reagent to give silver mirror and D. B reacts with D in the presence of concentrated sulphuric acid to give sweet smelling compound E. Identify A, B, C, D. and E. Give the reaction of C with ammonia
The compound which is optically active is:
Answer the following:
Name the two organic compounds which have the same molecular formula C2H6O. Will they react with PCl5? If they react, what are the products formed?
An organic compound [A] having molecular formula C2H7N on treatment with nitrous acid gives a compound [B] having molecular formula C2H6O. [B] on treatment with an organic compound [C] gives a carboxylic acid [D] and a sweet-smelling compound [E]. Oxidation of [B] with acidified potassium dichromate also gives [D].
(i) Identify [A], [B], [C], [D] and [E].
(ii) Write a balanced chemical equation of [D] with chlorine in the presence of red phosphorus and name the reaction.
An organic compound [A], having a specific smell forms two compounds [B] and [C] by reacting with conc. sodium hydroxide. The molecular formula of compound [B] is C7H8O, which forms compound [A] again on oxidation. Compound [C] forms benzene on heating with soda lime.
Write the structures of compounds [A], [B] and [C]. Also, write the reactions involved.
An organic compound [A] which has characteristic odour, reacts with conc. NaOH to give two compounds [B] and [C]. Compound [B] has molecular formula C7H8O which upon oxidation gives back compound [A]. Compound [C] is the sodium salt of the acid and upon treatment with sodalime yields an aromatic hydrocarbon [D]. Identify the compounds [A], [B], [C] and [D].
