Alcohol, Phenol and Ether Test

Result

Alcohol, Phenol and Ether Test - 19

Score
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Rank
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TIME Taken - -

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Weekly Quiz Competition

Question 1
1 / -0

Only One Option Correct Type
Direction (Q. Nos. 1-8) This section contains 8 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.
Consider the following reaction,
CH₂ = CH₂ + Cl₂ - H₂O → ClCH₂ — CH₂OH HOCH₂CH₂OH
Q.
The most appropriate reagent X for the above reaction is

A
NaOH(aq)

B
NaHCO₃(aq)

C
NH₃(aq)

D
H₂SO₄/H₂O

Solution

A slightly weaker base (NaHCO₃) is used in the second step S_N2 reaction otherwise oxirane formation would be preferred.
Question 2
1 / -0

Which is the most suitable condition for the following transformation?

A
O₃/Zn - H₂O then NaBH₄

B
CF₃CO₃H then NaBH₄

C
CF₃CO₃H then NaOH(aq)

D
KMnO₄ - NaOH(aq)

Solution

Epoxide, upon hydrolysis in either acidic or alkaline medium gives anti, vicinal diol.
Question 3
1 / -0

What is the increasing order of solubility of the following in water?

A
I < II < III < IV

B
I < III < II < IV

C
IV < III < II < I

D
IV < II < III < I

Solution

Greater the number of hydroxy groups, greater the solubility in water. Between (II) and (III), (III) is slightly less soluble due to greater hydrophobic alkyl fraction.
Question 4
1 / -0

How many different diols product are formed in the following reaction?

A
1

B
2

C
3

D
4

Solution

At planar carbonyl carbons, hydride ion attacks from both sides giving both stereomers. Hence, the product diols would be all stereomers of 2, 3 - butanediol.
Question 5
1 / -0

Which does not form dihalide when treated with ethylene glycol?

A
PCI₃

B
SOCI₂

C
PBr₃

D
PI₃

Solution

(d) PI₃ does not form di iodide with vicinal diols.
Question 6
1 / -0

What is the major organic product of the following reaction?

A

B

C

D

Solution

Both oxirane hydrolysis and halide substitution (S_N2) take place.
Question 7
1 / -0

What is formed as the major product in the reaction given below?

A

B

C

D

Solution
Question 8
1 / -0

The major organic product formed below is

A

B

C

D

Solution

Ethylene glycol on heating with concentrated H₂SO₄ gives 1 , 4-dioxane
Question 9
1 / -0

Matching List Type
Direction (Q . Nos. 9 and 10) C hoices for the correct combination of elements from Column I and Column II are given as options (a), (b), (c) and (d), out of which one is correct.
Q.
Match the reactant from Column I with the reaction(s) from Column II and mark the correct option from the codes given below.

A
a

B
b

C
c

D
d

Solution
Question 10
1 / -0

Match the compounds in Column I with their reaction and product(s) in Column II and mark the correct option from the codes given below.

A
a

B
b

C
c

D
d

Solution

(i) It is a symmetrical, 3° diol, gives (CH₃)₂CO with HIO₄, a single pinacolone (CH₃)₃C —COCH₃ and a single cyclic a mine :

(ii) With HIO₄ gives (CH₃)2CO and (C₆H₅)₂CO. (ii) is unsymmetrical, 3° diol, gives more than one pinacolone in rearrangement reaction. However it gives a single cyclic amine.

(iii) with HIO₄ gives a single ketone-acetophenone. It gives two different pinacolone in rearrangement reaction.

(iv) It is unsymmetrical, 3° diol, gives two different ketones with HIO₄ and more than one pinacolone in rearrangement reaction.