The carbon atom in carbonyl group is hybridised. The carbonyl group in aldehydes and ketones undergoes reactions. Aldehydes which have $α$ - H atom undergo reaction while aldehydes which have no $α$ -H atom undergo _ reaction.

s p^{3}

, nucleophilic substitutions, aldol condensation, Cannizzaro

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s p

, electrophilic substitution, Cannizzaro, aldol condensation

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s p^{2}

, nucleophilic addition, aldol condensation, Cannizzaro

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s p^{3}

, electrophilic addition, Cannizzaro, aldol condensation

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Solution

The correct option is C $s p^{2}$ , nucleophilic addition, aldol condensation, Cannizzaro
$3 σ b o n d + 1 π b o n d = s p^{2}$
Since carbonyls are electron deficient species, they undergo nucleophilic addition. And for aldol reaction, one $α - H$ is very very necessary otherwise it will undergo Cannizaro.

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Similar questions

Q. Assertion (A) :

C H_{3} C H O

on reaction with dil. NaOH forms aldol.
Reason (R) : Aldehydes and ketones having

α

-hydrogen undergo aldol condensation.

Q. Assertion :Alkenes undergo electrophilic addition whereas aldehydes and ketones undergo nucleophilic addition. Reason: In alkenes the double bond joins two carbon atoms and there is no resultant polarity. In carbonyl compounds, the carbonyl group is highly polar and the high partial positive charge on the C atom makes it subsceptible to nucleophilic attack.

Which of the following compounds would undergo aldol condensation, which the Cannizzaro reaction and which neither ? Write the structures of the expected products of aldol condensation or Cannizzaro reaction ?

Methanal

2-methyl pentanal

Benzaldehyde

Benzophenone

Cyclohexanone

l - phenyl propanone

Phenyl acetaldehyde

Butan - 1 - ol

2, 2 - dimethyl butanal

Q. Which of the following compounds would undergo aldol condensation, which undergoe Cannizzaro reaction and which neither? Write the structures of the expected products of aldol condensation and Cannizzaro reaction.
(i) Methanal (ii) 2-Methylpentanal (iii) Benzaldehyde
(iv) Benzophenone (v) Cyclohexanone (vi) 1-Phenylpropanone
(vii) Phenylacetaldehyde (viii) Butan-1-ol (ix) 2,2-Dimethylbutanal

Q. Statement- I:

(C H_{3})_{2} C H C H O

mainly undergoes Cannizzaro reaction when heated with the strong alkali.
Statement- II : Steric hindrance prevents aldol condensation.

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The carbon atom in carbonyl group is ______ hybridised. The carbonyl group in aldehydes and ketones undergoes ______ reactions. Aldehydes which have α- H atom undergo ______ reaction while aldehydes which have no α-H atom undergo _______ reaction.

The correct option is C sp2, nucleophilic addition, aldol condensation, Cannizzaro3σbond+1πbond=sp2 Since carbonyls are electron deficient species, they undergo nucleophilic addition. And for aldol reaction, one α−H is very very necessary otherwise it will undergo Cannizaro.

The carbon atom in carbonyl group is hybridised. The carbonyl group in aldehydes and ketones undergoes reactions. Aldehydes which have $α$ - H atom undergo reaction while aldehydes which have no $α$ -H atom undergo _ reaction.