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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
${C_2}{H_5}CHO$ and ${(C{H_3})_2}CO$ can be distinguished by testing with
  • A
    Phenyl hydrazine
  • B
    Hydroxylamine
  • ✓
    Fehling solution
  • D
    Sodium bisulphite
✓

Answer

Correct option: C.
Fehling solution
c
(c)${C_2}{H_5}CHO + 2C{u^{ + 2}} + 5O{H^ - } \to \mathop {C{u_2}O}\limits_{{\mathop{\rm Re}\nolimits} d\,\,ppt} + 3{H_2}O$
                                                                                                        $ + {C_2}{H_5}CO{O^ - }$
$C{H_3}COC{H_3} + 2C{u^{ + 2}} + 5O{H^ - } \to {\rm{No}}\,\,{\rm{reaction}}$

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