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Alcohols, Phenols and Ethers Quiz-9

Dear Readers,

JEE Advanced is a high level exam that checks your concept by putting various types of questions. The questions are in a different format from JEE mains.m, herein the questions are : single correct multiple choice questions, multiple correct multiple choice questions, statement based questions and comprehension type questions..

  •  i
  •  ii and iv
  •  i and iv
  •  ii and iii
Solution
(b) This is an example of intermolecular SN^2Williamson’s reaction


Q2. 
An industrial method for preparation of methanol is:
  •  Catalytic reduction of carbon monoxide in the presence of ZnO-Cr_2 O_3
  •  By reacting methane with steam at 900°C with nickel as catalyst
  •  By reacting formaldehyde with aqueous sodium hydroxide solution
  •  None of these
Solution
(a)

Q3. Which of the following is the best synthesis of the ether (A) shown below:
  •  
  •  
  •  
  •  
Solution
b


Q4. 
Which of the following is most acidic?
  •  Benzyl alcohol
  •  2-Butanol
  •  tert-Butyl alcohol
  •  Hydroxybenzene
Solution
(d) Phenol (hydroxyl benzene) is more acidic than alcohols

Q5.Which of the following statements is correct?
i. Glycerol on reaction with oxalic acid at 110°C(383K) and followed by heating and hydrolysis gives formic acid and glycerol
ii. Glycerol on reaction with oxalic acid at 230°C(503K) and followed by heating gives allyl alcohol
iii. Glycerol on oxidation with conc. HNO_3 gives glyceric acid and tartonic acid
iv Glycerol on oxidation with conc. HNO_3 gives glyceric acid
  •  i and ii
  •  i and iii
  •  iii and iv
  •  i,ii,iii,iv
Solution
(d)

Q6. Proof is defined as………the percentage by volume of alcohol in ethanol-water mixture
  •  Twice
  •  Thrice
  • Half
  •  Four times
Solution
(a)

Q7.
  •  
  •  
  •  
  •  d) All
Solution
(c)


Q8.
  •  
  •  The liberated Br^⊖attacks Et,displacing PhOBBr_2, which is ultimately hydrolysed to give the products
  •  The products are PhOH+EtBr+H_3 BO_3
  •  The products are PhBr+EtOH+H_3 BO_3
Solution
(d)

Q9.
  •  CH_2=CH_2
  •  CH_3-CH_2 OH
  •  CH_3-CH_2-O-CH_2-CH_3
  •  None
Solution
(b)

Q10. 
Give the decreasing order of reactivity of the following alkyl halides in the Williamson’s reaction
i. (CH_3 )_3 C-CH_2 Br
ii.ClCH_2 CH=CH_2
iii.ClCH_2 CH_2 CH_3
iv.BrCH_2 CH_2 CH_3

  •  ii>iv>iii>i
  •  i>iii>iv>ii
  •  ii>iii>iv>i
  • i>iv>iii>ii
Solution
(a) ii>iv>iii>i (allyl chloride>1° RBr>1°RCl>neopentyl bromide. (R-Br) bond is weaker than (R-Cl)bond SN^2 reaction is faster with (R-Br)than with (R-Cl)

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