English

Benzaldehyde does NOT show positive test with ______.

Advertisements
Advertisements

Question

Benzaldehyde does NOT show positive test with ______.

Options

  • Schiff reagent

  • Tollens' reagent

  • Sodium bisulphite solution

  • Fehling solution

MCQ
Fill in the Blanks
Advertisements

Solution

Benzaldehyde does NOT show positive test with Fehling solution.

Explanation:

Benzaldehyde is an aromatic aldehyde. Aromatic aldehydes do not reduce Fehling solution, so the test is negative. But they do give:

  • Schiff test
  • Tollens’ test
  • Sodium bisulphite addition

Therefore, Benzaldehyde does NOT give Fehling’s test.

shaalaa.com
  Is there an error in this question or solution?
Chapter 12: Aldehydes, Ketones and Carboxylic acids - Exercises [Page 280]

APPEARS IN

Balbharati Chemistry [English] Standard 12 Maharashtra State Board
Chapter 12 Aldehydes, Ketones and Carboxylic acids
Exercises | Q 1.6 | Page 280

RELATED QUESTIONS

Write a note on Stephen reaction.


Write reaction showing aldol condensation of cyclohexanone.


Answer in brief.

Write reaction showing conversion of Acetaldehyde into acetaldehyde dimethyl acetal.


Explain haloform reaction with suitable example.


Write reactions for the action of the following reagents on p-chlorobenzaldehyde.

Phenyl hydrazine


Aldol condensation between which of the following compounds followed by dehydration gives 4-Methylpent-3-en-2-one?


Which of the following compounds does NOT undergo aldol condensation?


Acetone on Clemmensen reduction gives ____________.


Identify the product Y in the following series of reactions.

\[\ce{4-Nitrotoluene ->[(CH3CO)2O/CrO3][273 - 278 K] X ->[H3O^+][\Delta] Y}\]


\[\ce{CH2 = CH2 ->[i) O3][ii) Zn/H2O] X ->[NH3] Y}\] ‘Y’ is:


Assertion: 2, 2-dimethyl propanoic acid does not give HVZ reaction.

Reason: 2-2, dimethyl propanoic acid does not have α-hydrogen atom.


Which one of the following reaction is an example of disproportionation reaction.


How will you convert benzaldehyde into the following compound?

Benzophenone


How will you convert benzaldehyde into the following compound?

α-hydroxy phenyl acetic acid


What is the action of HCN on propanone?


How will you prepare cinnamic acid from benzaldehyde?


How will you prepare acetaldehyde from ethyne?


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.


Write the structure of the major product of the aldol condensation of benzaldehyde with acetone.


How are the following compound obtained from alkyne?

Acetaldehyde


What is the action of hydrogen cyanide on the following?

Acetone


Write a note on Clemmensen reduction.


Write the structure of the products obtained from the following ketones by action of hydrazine in presence of a slightly acidic medium.




Write the structure of the products obtained from the following ketones by action of hydrazine in presence of strong base KOH.


Identify B in the following reaction:

\[\begin{array}{cc}
\ce{O}\phantom{........}\\
||\phantom{........}\\
\ce{\underset{(Acetone)}{CH3 - C - CH3}->[CrO3] B}
\end{array}\]


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:


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×