Home
Class 12
CHEMISTRY
Assertion : Aldehydes or ketones on heat...

Assertion : Aldehydes or ketones on heating with hydrazine and KOH or pot, tert butoxide in high boiling solvent such as ethylene glycol give the reduced product.
Reason : The reaction is known as Clemmensen's readuction.

A

If both assertion and reason are correct and reason is correct explanation for assertion.

B

If both assertion and reason are correct and reason is not correct explanation for assertion.

C

If assertion is correct but reason is incorrect.

D

If assertion as well as reason are both incorrect.

Text Solution

Verified by Experts

The correct Answer is:
B
Correct explanation. The reaction is known in Wolff Kishner Reduction.
Promotional Banner

Topper's Solved these Questions

  • ALDEHYDES AND KETONES

    DINESH PUBLICATION|Exercise Match the coloumn|3 Videos

  • ALDEHYDES AND KETONES

    DINESH PUBLICATION|Exercise Interger|5 Videos

  • ALDEHYDES AND KETONES

    DINESH PUBLICATION|Exercise Comprehension 7|2 Videos

  • ALCOHOLS AND PHENOLS

    DINESH PUBLICATION|Exercise Matrix|9 Videos

  • ALKALI EARTH METALS

    DINESH PUBLICATION|Exercise Unit test-12|5 Videos

Similar Questions

Explore conceptually related problems

Read the passage given below and answer the following questions: Reductive alkylation is the term applied to the process of introducing alkyl groups into ammonia or a primary or secondary amine by means of an aldehyde or ketone in the presence of a reducing agent. The present discussion is limited to those reductive alkylations in which the reducing agent is hydrogen and a catalyst or "nascent" hydrogen, usually from a metalacid combination, most of these reductive alkylations have been carried out with hydrogen and a catalyst. The principal variation excluded is that in which the reducing agent is formic acid or one of its derivatives, this modification is known as the Leuckart reaction. The process of reductive alkylation of ammonia consists in the addition of ammonia to a carbonyl compound and reduction of the addition compound or its dehydration product. The reaction usually is carried out in ethanol solution when the reduction is to be effected catalytically Since the primary amine is formed in the presence of the aldehyde it may react in the same way as ammonia, yielding an addition compound, a Schiff's base (RCH= NCH_(2)R) and finally, a secondary amine. Similarly, the primary amine may react with the imine, forming an addition product which also is reduced to a secondary amine Finally, the secondary amine may react with either the aldehyde or the imine to give products which are reduced to tertiary amines. Similar reactions may occur when the carbonyl compound employed is a ketone. (source: Emerson, W. S. (2011). The Preparation of Amines by Reductive Alkylation. Organic Reactions, 174–255. doi:10.1002/0471264180.or004.03 ) The reaction of ammonia and its derivatives with aldehydes is called:

Read the passage given below and answer the following questions: Reductive alkylation is the term applied to the process of introducing alkyl groups into ammonia or a primary or secondary amine by means of an aldehyde or ketone in the presence of a reducing agent. The present discussion is limited to those reductive alkylations in which the reducing agent is hydrogen and a catalyst or "nascent" hydrogen, usually from a metalacid combination, most of these reductive alkylations have been carried out with hydrogen and a catalyst. The principal variation excluded is that in which the reducing agent is formic acid or one of its derivatives, this modification is known as the Leuckart reaction. The process of reductive alkylation of ammonia consists in the addition of ammonia to a carbonyl compound and reduction of the addition compound or its dehydration product. The reaction usually is carried out in ethanol solution when the reduction is to be effected catalytically Since the primary amine is formed in the presence of the aldehyde it may react in the same way as ammonia, yielding an addition compound, a Schiff's base (RCH= NCH_(2)R) and finally, a secondary amine. Similarly, the primary amine may react with the imine, forming an addition product which also is reduced to a secondary amine Finally, the secondary amine may react with either the aldehyde or the imine to give products which are reduced to tertiary amines. Similar reactions may occur when the carbonyl compound employed is a ketone. (source: Emerson, W. S. (2011). The Preparation of Amines by Reductive Alkylation. Organic Reactions, 174–255. doi:10.1002/0471264180.or004.03 ) (CH_(3)CH_(2)CH_(2))_(2)NH +CH_(3)CH_(2)CHO to P overset(2[H])to Q The ompound Q is :

This section contains Assertion and Reason type questions .Each question has 4 choices (1)(2)(3) and (4) out of which only one is correct Assertion(A): cheese gives foul smell when left open in summer Reason:The reaction which occur by absorption of heat is known as hypothermic reaction.

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion of the assertion. (b) If both assertion and reason are true but reason is not the correct explanation of the assertion. (c) If assertion is true but reason is false. (d) If assertion is false but reason is true. Q. Assertion: Nitrobenzene is used as a solvent in friedel-Craft's reaction. Reason: Fusion of nitrobenzene with solid KOH gives a low yield of a mixture of o-and p-nitrophenols.

Read the passage given below and answer the following questions: Reductive alkylation is the term applied to the process of introducing alkyl groups into ammonia or a primary or secondary amine by means of an aldehyde or ketone in the presence of a reducing agent. The present discussion is limited to those reductive alkylations in which the reducing agent is hydrogen and a catalyst or "nascent" hydrogen, usually from a metalacid combination, most of these reductive alkylations have been carried out with hydrogen and a catalyst. The principal variation excluded is that in which the reducing agent is formic acid or one of its derivatives, this modification is known as the Leuckart reaction. The process of reductive alkylation of ammonia consists in the addition of ammonia to a carbonyl compound and reduction of the addition compound or its dehydration product. The reaction usually is carried out in ethanol solution when the reduction is to be effected catalytically Since the primary amine is formed in the presence of the aldehyde it may react in the same way as ammonia, yielding an addition compound, a Schiff's base (RCH= NCH_(2)R) and finally, a secondary amine. Similarly, the primary amine may react with the imine, forming an addition product which also is reduced to a secondary amine Finally, the secondary amine may react with either the aldehyde or the imine to give products which are reduced to tertiary amines. Similar reactions may occur when the carbonyl compound employed is a ketone. (source: Emerson, W. S. (2011). The Preparation of Amines by Reductive Alkylation. Organic Reactions, 174–255. doi:10.1002/0471264180.or004.03 ) Reductive alkylation of ammonia by means of an aldehyde in presence of hydrogen as reducing agents results in formation of:

Read the passage given below and answer the following questions: Reductive alkylation is the term applied to the process of introducing alkyl groups into ammonia or a primary or secondary amine by means of an aldehyde or ketone in the presence of a reducing agent. The present discussion is limited to those reductive alkylations in which the reducing agent is hydrogen and a catalyst or "nascent" hydrogen, usually from a metalacid combination, most of these reductive alkylations have been carried out with hydrogen and a catalyst. The principal variation excluded is that in which the reducing agent is formic acid or one of its derivatives, this modification is known as the Leuckart reaction. The process of reductive alkylation of ammonia consists in the addition of ammonia to a carbonyl compound and reduction of the addition compound or its dehydration product. The reaction usually is carried out in ethanol solution when the reduction is to be effected catalytically Since the primary amine is formed in the presence of the aldehyde it may react in the same way as ammonia, yielding an addition compound, a Schiff's base (RCH= NCH_(2)R) and finally, a secondary amine. Similarly, the primary amine may react with the imine, forming an addition product which also is reduced to a secondary amine Finally, the secondary amine may react with either the aldehyde or the imine to give products which are reduced to tertiary amines. Similar reactions may occur when the carbonyl compound employed is a ketone. (source: Emerson, W. S. (2011). The Preparation of Amines by Reductive Alkylation. Organic Reactions, 174–255. doi:10.1002/0471264180.or004.03 ) Ethanal on reaction with ammonia forms an imine (X) which on reaction with nascent hydrogen gives (Y). Identify ‘X’ and ‘Y’.

Read the passage given below and answer the following questions: Reductive alkylation is the term applied to the process of introducing alkyl groups into ammonia or a primary or secondary amine by means of an aldehyde or ketone in the presence of a reducing agent. The present discussion is limited to those reductive alkylations in which the reducing agent is hydrogen and a catalyst or "nascent" hydrogen, usually from a metalacid combination, most of these reductive alkylations have been carried out with hydrogen and a catalyst. The principal variation excluded is that in which the reducing agent is formic acid or one of its derivatives, this modification is known as the Leuckart reaction. The process of reductive alkylation of ammonia consists in the addition of ammonia to a carbonyl compound and reduction of the addition compound or its dehydration product. The reaction usually is carried out in ethanol solution when the reduction is to be effected catalytically Since the primary amine is formed in the presence of the aldehyde it may react in the same way as ammonia, yielding an addition compound, a Schiff's base (RCH= NCH_(2)R) and finally, a secondary amine. Similarly, the primary amine may react with the imine, forming an addition product which also is reduced to a secondary amine Finally, the secondary amine may react with either the aldehyde or the imine to give products which are reduced to tertiary amines. Similar reactions may occur when the carbonyl compound employed is a ketone. (source: Emerson, W. S. (2011). The Preparation of Amines by Reductive Alkylation. Organic Reactions, 174–255. doi:10.1002/0471264180.or004.03 ) Acetaldehyde is reacted with ammonia followed by reduction in presence of hydrogen as a catalyst. The primary amine so formed further reacts with acetaldehyde. The Schiff’s base formed during the reaction is:

DINESH PUBLICATION-ALDEHYDES AND KETONES -Asseration-Reason Type Question
  1. Assertion : It is not so easy to oxidise primary alcohols to aldehydic...

    Text Solution

    |

  2. Assertion : Alcohols are more boinling than aldehyes of comparable mol...

    Text Solution

    |

  3. Assertion : Benzaldehyde is less reactive towards nucleophilic additio...

    Text Solution

    |

  4. Assertion : Acid chlorides can not be converted to ketones by reacting...

    Text Solution

    |

  5. Assertion: Hydroxyketones are not directly used in Grignard reaction. ...

    Text Solution

    |

  6. Assertion: Isobutanal does not give iodoform test. Reason : It does ...

    Text Solution

    |

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

    Text Solution

    |

  8. Assertion : Aldehydes or ketones on heating with hydrazine and KOH or ...

    Text Solution

    |

  9. Assertion : alpha-hydrogen atoms in aldehydes or ketones are acidic. ...

    Text Solution

    |

  10. Assertion : Pentan-2-one and pentan-3-one can be distinguished with th...

    Text Solution

    |

  11. Assertion : RCOCl is reduced to RCHO with H(2) using Pd//BaSO(4) catal...

    Text Solution

    |

  12. Assertion : Grignard's synthesis is always carried in ethereal solutio...

    Text Solution

    |

  13. Assertion : Cannizzaro's reaction is a disproportionation reaction. ...

    Text Solution

    |

  14. Assertion: (CH(3))(3)C COC(CH(3))(3) and acetone can be distanguished ...

    Text Solution

    |

  15. Assertion : Aldol condensation can be catalysed both by acids and base...

    Text Solution

    |

  16. Assertion : Mixture of benzaldehyde and acetaldehyde in hot alkaline m...

    Text Solution

    |

  17. Assertion : Aromatic aldehydes and formaldehyde undergo Cannizzaro rea...

    Text Solution

    |

  18. Match the following columns

    Text Solution

    |

  19. Match the following columns

    Text Solution

    |

  20. Match the following columns

    Text Solution

    |