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Test: Properties of Alcohols - NEET MCQ


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10 Questions MCQ Test Chemistry Class 12 - Test: Properties of Alcohols

Test: Properties of Alcohols for NEET 2024 is part of Chemistry Class 12 preparation. The Test: Properties of Alcohols questions and answers have been prepared according to the NEET exam syllabus.The Test: Properties of Alcohols MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Properties of Alcohols below.
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Test: Properties of Alcohols - Question 1

Which of the following reacts with alcohols to form esters besides carboxylic acids?

Detailed Solution for Test: Properties of Alcohols - Question 1

The correct answer is option D
Acyl chloride
Esters are derived from carboxylic acids. A carboxylic acid contains the -COOH group, and in an ester the hydrogen in this group is replaced by a hydrocarbon group of some kind. We shall just be
looking at cases where it is replaced by an alkyl group, but it could equally well be an aryl group (one based on a benzene ring).
A common ester - ethyl ethanoate
The most commonly discussed ester is ethyl ethanoate. In this case, the hydrogen in the -COOH group has been replaced by an ethyl group

Test: Properties of Alcohols - Question 2

What happens when phenol is treated with ammonia in the presence of anhydrous ZnCl2?

Detailed Solution for Test: Properties of Alcohols - Question 2

The correct answer is Option D.

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Test: Properties of Alcohols - Question 3

 When aryl halide is heated with 6-8% NaOH solution ,at 623 K under 300 atm pressure we get:

Detailed Solution for Test: Properties of Alcohols - Question 3

The correct answer is Option A.
 
The aryl halide is heated with 6-8%. NaOH solution at 623K under 300 atm pressure 1) it gives sodium phenoxide 2) sodium phenoxide treated with HCl(acidification) then it gives phenol.

Test: Properties of Alcohols - Question 4

Which alkene is obtained on dehydration of the following alcohol in the presence of H2SO4 ?

Detailed Solution for Test: Properties of Alcohols - Question 4

 

Carbonium ion formed in 1st step undergoes rearrangement to give tert. carbonium ion since tert-carbonium ions are more stable than secondary one.

Test: Properties of Alcohols - Question 5

What is the product formed when excess of ethanol reacts with concentrated sulphuric acid at 383 K and then the temperature of reaction mixture is increased to 443 K?

Detailed Solution for Test: Properties of Alcohols - Question 5

Test: Properties of Alcohols - Question 6

Identify the alcohol or phenol from the following which is most soluble in water.

Detailed Solution for Test: Properties of Alcohols - Question 6

The correct option is A

CH3- OH

Larger the hydrocarbon part in the molecule lesser is the solubility. Since in methanol only CH3group is attached it is easily soluble.

Test: Properties of Alcohols - Question 7

Which of the following statement is correct?

Detailed Solution for Test: Properties of Alcohols - Question 7

The correct answer is Option D.

Phenols have higher boiling point than toluene due to the presence of intermolecular hydrogen bonding in phenols. The formation of hydrogen bonds increases the intermolecular force of attraction between the phenol molecules and thereby increases its boiling point.

Test: Properties of Alcohols - Question 8

Isopropyl alcohol on oxidation forms:

Detailed Solution for Test: Properties of Alcohols - Question 8

The correct answer is Option A.

Isopropyl alcohol forms acetone on oxidation. 
 
The reaction is as follows:

Test: Properties of Alcohols - Question 9

Which catalyst is used in Fischer-Speier esterification?

Detailed Solution for Test: Properties of Alcohols - Question 9

Fischer Esterification is an organic reaction that is employed to convert carboxylic acids in the presence of excess alcohol and a strong acid catalyst to give an ester as the final product. This ester is formed along with water.

  • The esterification of Fischer is one of the most common carboxylic acid reactions. Treatment with alcohol of carboxylic acids in the presence of acid catalyst contributes to the formation of esters along with the removal of a water molecule.
  • Fischer esterification uses sulphuric acid as a catalyst. It protonates the carboxylic acid carbonyl group and not the feature of hydroxyl.
Test: Properties of Alcohols - Question 10

Fermentation of Glucose to alcohol undergoes in presence of :

Detailed Solution for Test: Properties of Alcohols - Question 10

The correct answer is option D
Zymase is an enzyme complex that catalyzes the fermentation of sugar into ethanol and carbon dioxide. It occurs naturally in yeasts. Zymase activity varies among yeast strains. Zymase is also the brand name of the drug pancrelipase.

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