Home
Class 12
CHEMISTRY
Assertion (A): The following intramolecu...

Assertion (A): The following intramolecular aldol reaction occurs.

Reason (R ): `(CHO)` is a better acceptor than `(C-C=O)`.

A

If both (A) and (R) are correct and (R) is the corect explanation of (A)

B

If both (A) and (R) are correct but (R) is not correct explanation of (A)

C

If (A) is correct but (R) is incorrect.

D

If (A) is incorrect but (R) is correct

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • ALDEHYDES AND KETONES

    OP TANDON|Exercise MATRIX-MATCH TYPE QUESTIONS|8 Videos

  • ALDEHYDES AND KETONES

    OP TANDON|Exercise PASSAGE 1|5 Videos

  • ALDEHYDES AND KETONES

    OP TANDON|Exercise OBJECTIVE QUESTIONS (LEVEL -B) SET II|36 Videos

  • ALCOHOLS, PHENOLS AND ETHERS

    OP TANDON|Exercise SINGLE INETER ANSWER TYPE QUESTIONS / ALCOHOLS AND PHENOLS|15 Videos

  • BASIC PRINCIPLES

    OP TANDON|Exercise SECTION V INTEGER ANSWER TYPE QUESTION|3 Videos

Similar Questions

Explore conceptually related problems

Assertion (A): The following intramolecular aldol reaction occurs. Reason (R ): (CHO) is a better acceptor than (C==O) .

Assertion (A): The following intramolecular aldol reaction occurs. Reason (R ): The carbanion does not add to C-4 because a strained four-membered ring would result.

Assertion (A): The following cross Cannizzaro reaction occurs. Reason (R ): Rate of reaction is: Rate = K["Aldehyde(I)"]["Aldehyde(II)"][overset(Θ)(OH)] and bimolecular.

What is the product of the following intramolecular aldol condensation reaction? [qquad H] [qquad O]

Assertion (A): The following reaction occurs. Reason (R ): The semicarbazone of (A) (pentan-2-one) exists in two geometrical isomers.

Assertion (A): Sn reacts with HCl to produce H_(2) gas. Reason (R ): Sn is a better reducing agent than H_(2) gas.

What is the product of the following intramolecular aldol condensation reaction? OHC-(CH_{2})_{4}-CHO \overset{base}underset{heat}{\rightarrow}

Assertion (A): The product is: Reason (R ): p-NO_(2)-C_(6)H_(4)O^(-) is a stronger nucleophile than PhO^(-) .

Assertion :- The following reaction C-Cl+MFrarrC-F+M-Cl Proceed better with KF than NaF . Reason :- NaF is more ionic than KF

OP TANDON-ALDEHYDES AND KETONES -ASSERTION-REASON TYPE QUESTIONS
  1. (A) Carbonyl compounds take part in nucleophilic addition reactions. ...

    Text Solution

    |

  2. (A) Primary alcohols can be easily oxidised to aldehydes. (R) Aldehy...

    Text Solution

    |

  3. Assertion: The addition of ammonia derivative to a carbonyl compound i...

    Text Solution

    |

  4. (A) Fehiling's reagent is a test for all aliphatic aldehydes. (R) Al...

    Text Solution

    |

  5. (A) 2-Methlpropanal undergoes Cannizzaro's reaction. (R) It has no a...

    Text Solution

    |

  6. Assertion (A) Formaldehyde is a planar molecule. Reason (R) It conta...

    Text Solution

    |

  7. (A) Nitromethane can give aldol condensation. (R) alpha hydrogen of ...

    Text Solution

    |

  8. Assertion : Chloral hydrate is a stable compound. Reason : It is sta...

    Text Solution

    |

  9. (A) Acetaldehyde does not show aldol condensation. (R) Compounds ha...

    Text Solution

    |

  10. (A) Lower aldehydes and ketones are soluble in water but solubility de...

    Text Solution

    |

  11. Assertion : Dimethyl sulphide is commonly used for the reduction of a...

    Text Solution

    |

  12. (A) alpha-hydrogen atom of carbonly compouns is acidic in nature. (R...

    Text Solution

    |

  13. Assertion (A): The following intramolecular aldol reaction occurs. ...

    Text Solution

    |

  14. (A) Acetaldehyde reduces Fehlintgs' solution but benzaldehyde does not...

    Text Solution

    |

  15. (A) p-methoxy benzaldehyde is less recative than bensaldehyde towards ...

    Text Solution

    |

  16. (A) Benzaldehyde gives a positive test with Benedict's and Fehiling so...

    Text Solution

    |