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Test: Alcohols & Carboxylic Acids - UPSC MCQ


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10 Questions MCQ Test Science & Technology for UPSC CSE - Test: Alcohols & Carboxylic Acids

Test: Alcohols & Carboxylic Acids for UPSC 2025 is part of Science & Technology for UPSC CSE preparation. The Test: Alcohols & Carboxylic Acids questions and answers have been prepared according to the UPSC exam syllabus.The Test: Alcohols & Carboxylic Acids MCQs are made for UPSC 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Alcohols & Carboxylic Acids below.
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Test: Alcohols & Carboxylic Acids - Question 1

Aldehydes give carboxylic acids on:

Detailed Solution for Test: Alcohols & Carboxylic Acids - Question 1

When an aldehyde is oxidised, the product formed is a carboxylic acid.

Key points to understand this process:

  • Oxidation involves the addition of oxygen or the removal of hydrogen.
  • Aldehydes are converted to carboxylic acids through oxidation.
  • Common oxidising agents include alkaline potassium permanganate and acidified potassium dichromate.

These agents facilitate the transformation by providing the necessary conditions for the reaction.

Test: Alcohols & Carboxylic Acids - Question 2

Which gas is released when ethyl alcohol reacts with sodium?

Detailed Solution for Test: Alcohols & Carboxylic Acids - Question 2

Hydrogen gas is released.

Test: Alcohols & Carboxylic Acids - Question 3

In conversion from ethanol to ethene, concentrated sulphuric acid is used as:

Detailed Solution for Test: Alcohols & Carboxylic Acids - Question 3

Sulphuric acid is used as a dehydrating agent because sulphuric acid has a great affinity for water. It readily removes elements of water from other compounds i.e, it acts as a dehydrating agent, it being a hygroscopic substance absorbs water from other substances without dissolving in it, so it is considered a good drying agent.

Test: Alcohols & Carboxylic Acids - Question 4

IUPAC name of CH3COOH is:

Detailed Solution for Test: Alcohols & Carboxylic Acids - Question 4

Acetic acid, systematically named ethanoic acid, is a colourless liquid organic compound with the chemical formula 
CH3COOH .

Test: Alcohols & Carboxylic Acids - Question 5

Carboxylic acids are:

Detailed Solution for Test: Alcohols & Carboxylic Acids - Question 5

Carboxylic acid is a weak acid as it undergoes partial or incomplete dissociation in water.

Test: Alcohols & Carboxylic Acids - Question 6

In the reaction, identify the reactant X.
CH3COOH + X  CH3COOC2H5 + H2O
Ethanoic
acid

Detailed Solution for Test: Alcohols & Carboxylic Acids - Question 6

This is an esterification reaction in which a sweet smelling compound ester is formed.

Test: Alcohols & Carboxylic Acids - Question 7

The common name of ethanoic acid is:

Detailed Solution for Test: Alcohols & Carboxylic Acids - Question 7

The common name of ethanoic acid is acetic acid.

Test: Alcohols & Carboxylic Acids - Question 8

What is removed from ethanol during its dehydration to ethene?

Detailed Solution for Test: Alcohols & Carboxylic Acids - Question 8

The dehydration of ethanol to ethene involves the removal of water.

  • This process is a chemical reaction where ethanol loses a water molecule.
  • The reaction typically requires a catalyst, such as concentrated sulphuric acid.
  • During dehydration, ethanol (C2H5OH) is converted into ethene (C2H4), releasing water (H2O).
Test: Alcohols & Carboxylic Acids - Question 9

Which of the following will give a pleasant smell of ester when heated with ethyl alcohol and a small quantity of sulphuric acid?​

Detailed Solution for Test: Alcohols & Carboxylic Acids - Question 9

Ethanoic acid reacts with ethanol in the presence of concentrated sulphuric acid as a catalyst to produce the ester, ethyl ethanoate.

Test: Alcohols & Carboxylic Acids - Question 10

Why is ethanoic acid called glacial acetic acid?

Detailed Solution for Test: Alcohols & Carboxylic Acids - Question 10

Ethanoic acid is called glacial acetic acid because:

  • It solidifies into a solid form in cold weather, around 16.7°C (62°F).
  • This solid form resembles a glacier, giving rise to the name.
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