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Aldehydes and ketones undergo...

Aldehydes and ketones undergo

A

electrophilic addition

B

electrophilic substitution

C

nucleophilic addition

D

nucleophilic substitution.

Text Solution

Verified by Experts

The correct Answer is:
C
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Fill in the blanks by suitable choices. The carbon atom in carbonyl group is _____ hybridised. The carbonyl group in aldehydes and ketone undergoes____. The carbonyl group in aldehydes and ketones undergoes ______ reactions. Aldehydes which have alpha -H atom undergo ______ reaction while aldehydes which have no alpha -H atom undergo ______ reaction.

Explain the following (a) it is necessary to control the pH during the reaction of aldehydes or ketons with ammonia derivations . (b ) Benzophene does not react with sodium bisulphite (c ) Acetaldehyde gives aldol condensation while formaldehyde does not . (d ) HCHO reacts with nHCN faster than CH_3 CHO (e ) Aldehydes and ketons undergoes nucleophilic addition reactions .

Aldehyde and ketone undergo nucleophilic addition reaction because of polarity between gtC=O group . The reactivity of carbonyl groups toward nucleophile depends upon the nature of inductive effect of froup present at carbonyl carbon. Which among the following is more reactive towards nucleophilic addition reaction

Aldehyde and ketone undergo nucleophilic addition reaction because of polarity between gtC=O group . The reactivity of carbonyl groups toward nucleophile depends upon the nature of inductive effect of froup present at carbonyl carbon. Nucleophilic addition reaction over carbonyl compound is shown by :

Aldehyde and ketone undergo nucleophilic addition reaction because of polarity between gtC=O group . The reactivity of carbonyl groups toward nucleophile depends upon the nature of inductive effect of froup present at carbonyl carbon. Which of the following is least reactive for nucleophilic addition reaction

Aldehydes and ketones are

Knowledge Check

  • Statement -:I : The B.P' s aldehydes and ketones are higher than those of ethers of comparable molecular masses. Statement -:II: Aldehydes and ketones undergo intermolecular association due to dipole -dipole interactions.

    A
    Both the statements are true and statement- II is the correct explanation of statement -I.
    B
    Both statements are true but statement -II is not the correct explanation of statement -I.
    C
    Statement-I is true but statement -II is falsae
    D
    Statement -I is false but statement- II is true

  • Fill in the blanks by suitable choices. The carbon atom in carbonyl group is _____ hybridised. The carbonyl group in aldehydes and ketone undergoes____. The carbonyl group in aldehydes and ketones undergoes ______ reactions. Aldehydes which have alpha -H atom undergo ______ reaction while aldehydes which have no alpha -H atom undergo ______ reaction.

    A
    `sp^(3)` nucleophilic substitutions, aldol condensation, Cannizzaro
    B
    sp, electrophilic substitution, Cannizzro, aldol condensation
    C
    `sp^(2)`, nucleophilic addition, aldol condensation, Cannizaro
    D
    `sp^(3)`, electrophilic addition, Cannizzaro, aldol condensation

  • Aldehyde and ketone undergo nucleophilic addition reaction because of polarity between gtC=O group . The reactivity of carbonyl groups toward nucleophile depends upon the nature of inductive effect of froup present at carbonyl carbon. Which among the following is more reactive towards nucleophilic addition reaction

    A
    `FCH_(2)CHO`
    B
    `ClCH_(2)CHO`
    C
    `Br CH_(2)CHO`
    D
    `I CH_(2)CHO`
    • MODERN PUBLICATION-ALDEHYDES ,KETONES AND CARBOXYLIC ACIDS-REVISION EXERCISES (OBJECTIVE QUESTIONS - MULTIPLE CHOICE QUESTIONS )
    1. Aldehydes and ketones undergo

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    2. Which of the following is most reactive towards nucleophilic addition ...

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    3. In the carbonyl group, the carbon atom undergoes

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    4. CH3 COCl underset(BaSO4) overset(Pd,H2) to X,X is

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    5. Which of the following gives iodoform test?

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    6. The reaction of formaldehyde with methyl magnesium bromide followed by...

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    7. Which of the following will not undergo aldol condensation?

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    8. Which of the following is the strongest acid ?

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    9. Vinegar is dilute aqueous solution of

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    10. Salicylic acid on heating with soda lime gives

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    11. The strongest acid among the following is

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    12. Carboxylic acids are reduced by red P and HI to

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    13. Formic acid and acetic acid are distinguished by

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    14. Which of the following compounds does not have a carboxyl group ?

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    15. The conversion of a carboxylic acid to alpha-bromocarboxylic acid usin...

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    16. RCOOAg+Br(2)overset(C C1(4))underset(Delta)rarrR-Br+AgBr+CO(2) this re...

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    17. Benzene reacts with CH(3)COCl in the presence of anhy AlCl(3) to give

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    18. Decarboxylation of sodium benzoate on heating with soda lime gives

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    19. Benzoic acid reacts with LiAIH4 to give

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    20. The IUPAC name of the compound CH3 -CH2 - overset(O ) overset(||)C-...

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