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8.1. Aldehydes and ketones — Chemistry STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceChemistry8.1. Aldehydes and ketones1 Mark
MCQ
Positive Tollen's test is observed for
  • ✓
    $A,B,C$
  • B
    $A,B,D$
  • C
    $B,C$
  • D
    $A,B$
✓

Answer

Correct option: A.
$A,B,C$
a
$\alpha, \beta$-unsaturated aldehydes, aromatic aldehydes and $\alpha$-hydroxyketones all give tollens' test but ketones (including $\alpha, \beta$-unsaturated) do not give this test. Thus, option ( $a , b$ and $c$ ) are correct.

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