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NCERT Class XII Chemistry
Chapter - Aldehydes, Ketones and Carboxylic Acids
Questions with Solutions

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Question : 15
Total: 28
How will you bring about the following conversions in not more than two steps?
(i) Propanone to Propene
(ii) Benzoic acid to Benzaldehyde
(iii) Ethanol to 3-Hydroxybutanal
(iv) Benzene to m-Nitroacetophenone
(v) Benzaldehyde to Benzophenone
(vi) Bromobenzeneto 1-Phenylethanol
(vii) Benzaldehyde to 3-Phenylpropan-1-ol
(viii) Benzaldehyde to α-Hydroxyphenylacetic acid
(ix) Benzoic acid to m-Nitrobenzyl alcohol
Solution:  
(i) Propanone to Propene :
CH3−
C
||
O
−CH3
Propanone
H2∕Ni
––––––––▶
CH3−
C
|
OH
H−CH3
2−Propanol
Conc.H2SO4
––––––––▶
443K
CH3−CH−CH2
Propane
(ii) Benzoic acid to Benzaldehyde :
(iii) Ethanol to 3-Hydroxybutanal :
(iv) Benzene to m-Nitroacetophenone :
(v) Benzaldehyde to Benzophenone :
(vi) Bromobenzene to 1-Phenylethanol
(vii) Benzaldehyde to 3-Phenylpropan-1-ol :
(viii) Benzaldehyde to α-Hydroxyphenylacetic acid :
(ix) Benzoic acid to m-Nitrobenzyl alcohol :
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