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Statement -I: Crossed Cannizzaro reactio...

Statement -I: Crossed Cannizzaro reaction between formaldehyde and benzaldehyde gives benzyl alcohol and formate ion.
Statement -II: Formaldehyde is a better hydride donor then benzaldehyde.

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

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Assertion : Cross Cannizzaro's reaction between methanal and benzaldehyde gives benzyl alcohol and formate ion. Reason : Benzaldehyde does not contain a-hydrogen atom.

Formaldehyde and benzaldehyde give cannizzaro reaction but acetaldehyde does not. Explain

Knowledge Check

  • Assertion: Cross Cannizzaro reaction between formaldehyde and benzaldehyde gives benzyl alcohol and formate ion. Reason: Formaldehyde is a better hydride donor than benzaldehyde.

    A
    if both assertion and reson are true, and reason is the true explanation of the assertion.
    B
    If both assertion and reason are true, but reason is not the true explanation of the assertion.
    C
    if assertion is true, but reason is false.
    D
    If both assertion and reason are false.

  • Statement-1: Formaldehyde is more reactive than benzaldehyde for nucleophilic addition reaction. Statement-2: Formaldehyde is more stable than benzaldehyde.

    A
    Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for statement-1
    B
    statement-1 is true, statement-2 is true, statement-2 is NOT a correct explanation for statement-1
    C
    statement-1 is true, statement-2 is false
    D
    statement-1 is false, statement-2 is true

  • Statement -I: Propanal undergoes Cannizzaro 's reaction. Statement -II It has an alpha - hydrogen atom.

    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

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    How will you differentiate between? (i) Aceetaldehyde and acetone. (ii) Aldehydes and ketones with (i) Tollens's regent (ii) Fehling's solution (iii) Acetone and diethyl ether (iv) Formaldehyde and acetaldehyde. (v) Ethyl alcohol and acetone (vi) Formaldehyde and ethyl alcohol (vii) Pentan-2-one and pentan-3-one (viii) Benzaldehyde and acetophenone (ix) Benzaldehyde and acetaldehyde ltbr (x) Benzaldehyde and introbenzene.

    STATEMENT-1: Formaldehyde is more reactive than benzaldehyde for nucleophilic additior reaction. and STATEMENT-2: Formaldehyde is more stable than benzaldehyde.

    Statement :I :Benzaldehyde undergoes aldol condensation. Statement -II: It does not contain any prop - hydrogen atom.

    Statement-I: Benzaldehyde does not undergoes aldol condensation. Because Statement-II: Benzaldehyde does not contains acidic alpha- Hydrogen.

    Reaction of Benzaldehyde with formaldehyde in the presence of conc. NaOH gives:

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