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Aldehydes and Ketones Quiz-12

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The one subject in NEET which is candidates who can easily attain good marks is Chemistry. That's the reason, often, one doesn’t pay notice and choose to compromise it. But if one wants to rank above others, the tip is to be thorough with NEET chemistry concepts. The understanding of reactions and definite basic understanding is what requires major attention in Chemistry but once done it only gets simpler from there. The main focus on the to-do list should be on getting a hang of the NCERT syllabus of NEET chemistry. .

Q1. Name the end product in the following series of reactions,


  •  CH4
  •  CH3OH
  •  Acetonitrile
  •  Ammonium acetate
Solution


CH3 CN is ethane nitrile or acetonitrile or methyl cyanide.

Q2.The enolic form of acetone contains:
  •  9 σ-bonds, 1Ï€-bond and 2 lone pairs
  •  8 σ-bonds, 2Ï€-bond and 2 lone pairs
  •  10 σ-bonds, 1Ï€-bond and 1 lone pair
  •  9 σ-bonds, 2Ï€-bond and 1 lone pairs
Solution


Q3.   Acetaldehyde cannot show
  •  Iodoform test
  •  Lucas test
  •  Benedict’s test
  •  Tollen’s test
Solution
Acetaldehyde cannot show Lucas test because Lucas test is given by alcohols only. It is used in the distinction between primary, secondary and tertiary alcohols. Conc. HCl+ anhydrous ZnCI_2 is called Lucas reagent.


Q4. Î±,β- unsaturated aldehyde is formed in the sequence
  •  

  •  

  •  

  •  

Solution



Q5. In the conversion of Grignard reagent into an aldehyde, the other component used in
  •  Ethyl formate
  •  Ethyl acetate
  •  Ethyl cyanide
  •  Hydrogen cyanide
Solution
 

Q6. 

  •  

  •  


  •  

Solution


Q7.
in given compounds is :
  •  

  •  

  •  

  •  

Solution
Positive IE of alkyl gp. decreases positive charge on C^+ centre of carbonyl gp. and thus, reactivity order is, HCHO>CH3 CHO>C22 H5 CHO>CH3 COCH3

Q8.

  •  

  •  

  •  

  •  

Solution


This reaction is an example of intramolecular Cannizaro’s reaction.

Q9.The end product ‘C’ in the following sequence of chemical reactions is


  •  Acetaldehyde oxime
  •  Formaldehyde oxime
  •  Methyl nitrate
  •  Acetoxime
Solution


acetoxime

Q10. The ease of hydrolysis with an alkali in the compounds Is of the order


  •  I>II>III>IV
  •  IV>III>II>I
  •  I>II>IV>III
  • II>I>IV>III
Solution
The order of the acidic characters of acid derivative or their ease of hydrolysis with alkali is given below : CH3COCl>CH3CO-O-COCH3>CH3COOC2H5>CH3CONH

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Quiz-12 Aldehydes and Ketones
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