Advertisements
Advertisements
Questions
Write a reaction to distinguish acetaldehyde from acetone.
Write a chemical test to distinguish between the following pair of compounds:
Acetaldehyde and acetone
Advertisements
Solution
1. Tollens’ reagent test: Acetaldehyde being an aldehyde reduces Tollens’ reagent to shining silver mirror, whereas propanone being acetone does not.
\[\ce{\underset{\text{Acetaldehyde}}{CH3CHO} + \underset{\text{Tollens’ reagent}}{2[Ag(NH3)2]+} + 3OH- -> \underset{\text{Acetate ion}}{CH3COO-} + \underset{\text{Silver metal}}{2Ag ↓} + 4NH3 + 2H2O}\]
\[\ce{\underset{\text{Acetone}}{CH3COCH3} ->[Tollens{'}reagent] No silver mirror}\]
2. Fehling’s solution test: Acetaldehyde reduces Fehling’s solution to red precipitate of Cu2O, whereas acetone does not react.
\[\ce{\underset{Acetaldehyde}{CH3CHO} + \underset{{From Fehling’s solution}}{2Cu^2+ + 5OH^-} → \underset{Acetate ion}{CH3COO^-} + \underset{Cuprous oxide (Red ppt{.})}{Cu2O↓} + 3H2O}\]
APPEARS IN
RELATED QUESTIONS
Explain haloform reaction with suitable example.
Write reactions for the action of the following reagents on p-chlorobenzaldehyde.
Tollen’s reagent
Which of the following gives red precipitate with Fehling's solution?
Identify B in the following reaction,
\[\ce{Acetaldoxime ->[Na][alcohol] A ->[NaNO2][HCl] B + H2O + N2\uparrow}\]
Compounds of general formula, are called ____________.
\[\begin{array}{cc} \phantom{...}\ce{R}\phantom{....}\ce{OR''}\phantom{}\\ \phantom{}\backslash\phantom{..}/\\ \ce{C}\\ \phantom{}/\phantom{..}\backslash\\ \phantom{...}\ce{R'}\phantom{...}\ce{OR''}\phantom{} \end{array}\]
An aldehyde or ketone reacts with hydrogen cyanide to form corresponding cyanohydrin derivatives. This reaction is an example of ____________.
Which of the following carbonyl compounds does NOT undergo aldol condensation?
Which of the following is a Wolf - Kishner reduction?
Which among the following compounds does NOT undergo aldol condensation?
Which of the following represents the correct order of acidity in the given compounds.
Phenyl methanal is reacted with concentrated NaOH to give two products X and Y. X reacts with metallic sodium to liberate hydrogen X and Y are ____________.
In which of the following reactions new carbon-carbon bond is not formed?
How will you convert benzaldehyde into the following compound?
Benzoic acid
How is the following conversion effected propanal into butanone?
How will you prepare lactic acid from ethanol?
How propanal is converted into propane.
Which one of the following reactions will not result in the formation of a carbon-carbon bond?
Write the structure of the major product of the aldol condensation of benzaldehyde with acetone.
Write a note on Clemmensen reduction.
Write reactions when phenol reacts with Dilute HNO3
What is the action of the following regent on propanal?
Sodium Bisulphite
How will you prepare acetic anhydride from acetic acid.
Write the structure of the major product of the aldol condensation of benzaldehyde with acetone.
Write the structure of the major product of the aldol condensation of benzaldehyde with acetone.
How will you prepare Acetic anhydride from acetic acid.
Write the structure of the major product of the aldol condensation of benzaldehyde with acetone.
The products formed in the following reaction, A and B are:
