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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
Which one of the combinations will give propanaldehyde on dry distillation?
  • A
    $(C_6H_5COO)_2Ca$ and $(HCOO)_2Ca$
  • B
    $(CH_3COO)_2Ca$ and $(CH-3CH_2-COO)_2Ca$
  • ✓
    $(CH_3-CH_2-COO)_2Ca$ and $(HCOO)_2Ca$
  • D
    $(CH_3COO)_2Ca$ and $(CH_3COO)_2Ca$
✓

Answer

Correct option: C.
$(CH_3-CH_2-COO)_2Ca$ and $(HCOO)_2Ca$
c
Dry distillation of a mixture of calcium propionate and calcium formate gives propanaldehyde.

$\left( CH _3- CH _2- COO \right)_2 Ca +( HCOO )_2 Ca \stackrel{\text { drydistillation }}{\longrightarrow} 2 CH _3 CH _2 CHO + CaCO _3$

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