Alcohols, Phenols and Ethers- Quiz 2

Alcohols, Phenols and Ethers Quiz-2

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. 
Which of the following alcohols has the highest boiling point?

•  Methanol
•  2-Butanol
•  1-Butanol
•  2-Methyl-2-propanol

Solution
(c)
All are alcohols and form H-Bonding. Options (b), (c) and (d) have four C atoms. Only (C) is a straight chain alcohol having a larger surface area, and thus high boiling point

Q2. 

•  Ethanol
•  Ethanal
•  Methanol
•  Methanal

Solution
c

Q3. Consider the reaction C₃ H₇-OH + Et₃ O^⊕ BF₄^⊖→C₃ H₇-O-Et+EtOEt+HBF₄ Which of the following statements id wrong?:

•  The nucleophile in the reaction is C₃ H₇ OH
•  The nucleophile in the reaction is BF₄^⊖
•  The leaving group is Et₂ O
•  SN2 reaction occurs

Solution
b

Q4. 
Which of the following reactions is possible?

•  Me₃ C-ONa+Me₃ C-Br→Me₃ C-O-CMe₃
•  Me₂ CH-ONa+Me₂ CHBr→Me₂ CH-O-CHMe₂
•  PhONa+PhBr→PhOPh
•  PhONa+CH₃ Br→PhOCH₃

Solution
d

Q5.
Which of the following ethers is present in clove oil?

•  Anethole
•  Eugenol
•  Vanillin
•  Thymol

Solution
b

Q6. 

•  II>I>III
•  III>I>II
• II>III>I
•  I>III>II

Solution
(a)
Due to two e ̅-withdrawing (C=O) groups in (II), it is more acidic than (I) (one EW (C=O) group) Moreover, (II) is much more resonance stabilised than (I)

Q7.
When propanol is heated with Al₂ O₃ at 380°C(633 K), the product obtained is:

•  Dipropyl ether
•  Propene
•  Ethene
•  Diethyl ether

Solution
b

Q8.

:

•  I, II, and III
•  I, III, and II
•  III, II, and I
•  III, I, and II

Solution
(c)
B_2 H_6/THF besides reacting at (C==C) also selectively reduces only (-COOH) group to (-CH)_2 OH) group in cyclic ester

Q9.Amongst the following phenols which one is most acidic?

•  Picric acid
•  2-Nitrophenol
•  2,4-Dinitrophenol
•  m-Nitrophenol

Solution
(a)
Picric acid is the strongest acid due to the presence of three (NO₂) group (-R and –Ieffect)

Q10. 
Which among the following compounds will not give effervescence with sodium bicarbonate?

•  C₆ H₅ CO₂ H
•  C₆ H₅ SO₃ H
•  C₆ H₅ OH
• Picric acid

Solution
(c)
Phenol does not react with NaHCO₃ or Na₂ CO₃. Although picric acid is a phenolic compound (2,4,6- trinitrophenol), due to the presence of 3NO₂group (EWG), it is highly acidic and reacts with NaHCO₃ or Na₂ CO₃