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Aldehydes and Ketones Quiz-3

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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. In the estimation of nitrogen by Duma’s method 1.18 g of an organic compound gave 224 mL of
at NTP. The percentage of nitrogen in the compound is about:
  •  20.0
  •  11.8
  •  47.5
  •  23.7
Solution


Q2.Maleic and fumaric acids:
  •  Have identical m.p.
  •  Have identical solubility in water
  •  Form the same anhydride on heating
  •  None of the above
Solution
Maleic and fumaric acid are geometrical isomers (cis- and trans-respectively) having different physical properties but almost same chemical nature. 


Q3.  Wolff-Kishner reduction, reduces
  •   −COOH group
  •  −C≡C− group
  •  −CHO group
  •  −O− group
Solution
−CHO group

Q4. The reaction of HCOOH with conc. 
gives:
  •  CO2
  •  CO
  •  Oxalic acid
  •  Acetic acid
Solution

Q5.Which statement is correct?
  •  RCOOOH is stronger acid than RCOOH
  •  Maleic acid is stronger than fumaric acid
  •  Both (a) and (b)
  •  None of the above
Solution
 Maleic acid contains intramolecular hydrogen bonding while Fumaric acid contains iuntermolecular bonding. Thus, maleic acid forms more stable maleate ion after the removal of . Hence maleric acid is stronger acid than Fumaric acid 

Q6. Jone’s reagent is:
  •  
  •  
  •  None of the above
Solution


Q7.Turpentine oil can be purified by:
  •  Vacuum distillation
  •  Fractional distillation
  •  Steam distillation
  •  Simple distillation
Solution
Steam distillation

Q8.Salicylic acid gives a compound known as oil of winter green when treated with
  •  
  •  
  •  
  •  
Solution


Q9.Give stereochemical formula for compound (D)
  •  
  •  
  •  
  •  
Solution


Q10. The substance used as an adsorbent in the column chromatography is:
  •  
  •  
  •  
  • Alum
Solution
 is used as absorbent. the other absorbents are MgO, silica gel, cellulose powder, animal charcoal, etc.

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