Q95 / 200 · NEET 2007 · Chemistry

The product formed in aldol condensation is:

  • Correct answer
    A
    a-beta hydroxy aldehyde or a betahydroxy ketone
  • B
    an alpha-hydroxy aldehyde or ketone
  • C
    an alpha, beta unsaturated ester
  • D
    a beta-hydroxy acid

Solution

Aldehydes and ketones having at least one $\alpha$-hydrogen atom in presence of dilute alkali give $\beta$-hydroxy aldehyde or $\beta$-hydroxy ketone. Figure
Caution Those aldehydes which does not have $\alpha$-hydrogen atom like $\mathrm{HCHO}$, does not give aldol condensation reaction.

Hence, the correct answer is option: 'A'.

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