Alcohols, Phenols and Ethers - Quiz 9

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..

Q1. 

i. The product (A) is HO-CH_2-CH_2-CH_2-CH_2 OH
ii. The product (A) is (tetrahydrofuran, THF)
iii. (A) is prepared by SN^2reaction
iv.(A) is prepared by intramolecular SN^2 reaction

•  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)