Moderate

Aldol condensation takes place in the presence of _ ?

Correct answer: C. NaOH

  • A. H2SO4
  • B. K2Cr207
  • C. NaOH
  • D. H20/H+

Explanation

Option C is correct since the aldol reaction happens in aldehydes and ketones if the compounds contain no less than one α-hydrogen. Therefore, the reaction occurs in the presence of alkali (dilute). The dilute alkali acts as a catalyst in the reaction and helps in the formation of β-hydroxy aldehydes or aldol and β-hydroxy ketones or ketol.

Last updated

About Aldehydes and Ketones

Aldehydes and ketones contain the polar carbonyl group, but aldehydes are generally more readily oxidised and more reactive than ketones. Coverage includes preparation by oxidation or reduction routes, nucleophilic addition of reagents such as hydrogen cyanide and bisulfite, and tests that distinguish aldehydes from ketones.

Practise Aldehydes and Ketones

679 free Aldehydes and Ketones MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.

Exams that ask Chemistry questions like this

Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.

Related questions