Home
Class 12
CHEMISTRY
Assertion: Benzaldehyde is more reactive...

Assertion: Benzaldehyde is more reactive than ethanal towards nucleophilic attact.
Reason : The overall effect of- `l` and `+R` effect of phenyl group decrease the electron density on the carbon atom of `gtC = O` group in benzaldehyde.

A

If Both assertion and reason are true reason is the correct explation of the assertion.

B

If Both assertion and reason are true but reason is not the correct explation of the assertion.

C

If assertion is true but reason is false.

D

If assertion is false but reason is true.

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • ALDEHYDES, KETONES AND CARBOXYLIC ACID

    A2Z|Exercise AIPMT/NEET Questions|43 Videos

  • ALDEHYDES, KETONES AND CARBOXYLIC ACID

    A2Z|Exercise AIIMS Questions|40 Videos

  • ALDEHYDES, KETONES AND CARBOXYLIC ACID

    A2Z|Exercise Section A (Topicwise question|3 Videos

  • ALCOHOLS, PHENOLS AND ETHERS

    A2Z|Exercise Section D - Chapter End Test|30 Videos

  • BIOMOLECULES

    A2Z|Exercise Section D - Chapter End Test|30 Videos

Similar Questions

Explore conceptually related problems

Assertion : Benzaldehyde is less reactive than propanal towards nucleophilic addition reactions. Reason : Benzaldehyde is less sterically hindred.

Assertion: Phenol is more reactive than benzene towards electrophilic reactions. Reason : The +R effect of OH group increases the electron density on benzene nucleus.

Assertion: Acetanilide is more reactive than aniline towards electrophilic substitution reactions. Reason: The activating effect of NHCOCH_3 is less than that of amino group

Assertion (A) Benzaldehyde is less reactive in comparison to ethonal towards nucleophilic attack. Reason (R ) All the carbon atoms of benzaldehyde are sp^(2) - hybridised.

(A) p-methoxy benzaldehyde is less recative than bensaldehyde towards cyanohydrin formation. (R) The +R effect methoxy group increases the electron deficiency of the carbonyl carbon.

Assertion : Anhydrides are more reactive than ester for nucleophilic substitution Reason : R.COO– is better leaving group than R–O–

A2Z-ALDEHYDES, KETONES AND CARBOXYLIC ACID-Section B - Assertion Reasoning
  1. Assertion: (CH(3))(3)C COC(CH(3))(3) and acetone can be distanguished ...

    Text Solution

    |

  2. Assertion: Cyclohexanone exhibits keto-enol tautomerism. Reason : In...

    Text Solution

    |

  3. Assertion: Benzaldehyde is more reactive than ethanal towards nucleoph...

    Text Solution

    |

  4. Assertion: p-N, N-dimethylaminobenzaldehy under-goes benzoin condensat...

    Text Solution

    |

  5. Assertion: In sodium formate, both the C - O bonds have same value 1.2...

    Text Solution

    |

  6. Assertion: Esters which contain alpha-hydrogens undergo Claisen conden...

    Text Solution

    |

  7. Assertion: beta-Keto carboxylic acids lose CO(2) when heated of about ...

    Text Solution

    |

  8. Assertion: The acetate ion is resonance stablized Reason : Acetate i...

    Text Solution

    |

  9. Assertion: p-hydroxybenzoic acid has a lower boiling point than o-hydr...

    Text Solution

    |

  10. Assertion: Aromatic aldehydes can be distinguished from aliphatic alde...

    Text Solution

    |

  11. Assertion: Paracids are stronger acids than corresponding carboxylic a...

    Text Solution

    |

  12. Assertion: Acerylic acid (CH(2) - CHCOOH) is a weaker acid than benzon...

    Text Solution

    |

  13. Assertion: Acetoacetic ester (CH(3)COCH(2)COOHH(5)) contains CH(3)CO g...

    Text Solution

    |

  14. Assertion: 2-Butanal lacks enolisable H-atom , alpha- to carbonyl grou...

    Text Solution

    |

  15. Assertion: Formic acid reduces Tollens reagent. Reason : Compounds c...

    Text Solution

    |

  16. Assertion: Aldehyde and keton ungergo nucleophilic addition reaction w...

    Text Solution

    |

  17. Assertion: The rate of addition reaction of alcohol on aldoehyde can b...

    Text Solution

    |

  18. Assertion: Compound II is more reaction towards nuclophilic additio...

    Text Solution

    |

  19. Assertion: NaHSO(3) is used in separation and purification of aldehyde...

    Text Solution

    |

  20. Assertion: Dehydration of aldol takes place by the following mechanism...

    Text Solution

    |