Alcohols Test

Result

Alcohols Test - 2

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Weekly Quiz Competition

Question 1
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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.
Q,
Which of the following pairs of compounds can be used as starting material in the synthesis of 2-phenyl-2-pentanol?

A
CH₃ —(CH₂ )₂ —CH₂ Br and C₆ H₅ COOH

B
(CH₃ )₂ CHCH₂ Br and PhCOCH₃

C
PhBr and CH₃ CH₂ CH₂ COCH₃

D
PhBr and (CH₃ )₂ CHCH₂ COCH₃

Solution
Question 2
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What is the product of the reaction of methyl cyclohexene with B₂ H₆ in THF followed by the oxidation with alkaline H₂ O₂ ?

A
Both II and III

B
Only II

C
Both III and IV

D
Both I and IV

Solution
Question 3
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Choose the reagent and reactant that would produce 2-methyl-2-butanol as the major product.

A
I, II and II

B
Both I and III

C
Only I

D
Only III

Solution
Question 4
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Ethanol is converted into ethoxy ethane,

A
by heating excess of ethanol with conc. H₂ SO₄ at 413 K or 140 ºC

B
by heating Ethanol with excess of conc. H₂ SO₄ at 443 K

C
by treating with conc. H₂ SO₄ at room temperature

D
by treating with conc. H₂ SO₄ at 273 K

Solution

In order to obtain ethoxy ethane from ethanol, the ethanol must be subjected to the effect of concentrated sulphuric acid at 413 Kelvin or 140 °C as shown below:
Question 5
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What is the correct structure for the major compound produced by the following reaction sequence?

A

B

C

D

Solution

Reaction involves rearrangement of carbocation
Question 6
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In the reaction given below,
The final major organic product is

A

B

C

D

Solution

It is an oxo process of synthesis of alcohols.
Question 7
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Primary alcohol can easily be prepared from primary alkyl halide via S_N 2 reaction with aqueous NaOH. However, similar method does not work for the preparation of tertiary alcohol. Which reaction can be used for the efficient preparation of tertiary alcohol {tertiary butanol) from tertiary butyl bromide?

A

B

C

D

Solution
Question 8
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What is the major product in the following reaction?

A

B

C

D

Solution

In oxymercuration-demercuration reaction, Markownikoff 's addition of H₂ O takes place with HO^- added to carbon where more stable carbocation could be formed.
Question 9
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Direction (Q. Nos. 9-15) This section contains 7 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correct.

In the following reaction,

The possible substitution product(s) is/are

A

B

C

D

Solution

It is a S_N 1 reaction.

(I) and (II) undergo nucleophilic attack by H₂ O giving the desired products.
Question 10
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In the following reaction,

Possible product(s) is/are

A

B

C

D

Solution

Oxo proces

The aldehydes formed above undergo reduction to give the desired products.