Chemistry · Science General

Alcohols, Ethers and Carboxylic Acids

359 Questions

Alcohols, ethers, and carboxylic acids questions explore organic chemistry reactions, chemical formulas, and compound identifications. The topics cover practical applications like antifreeze production and specific chemical conversions. This material helps candidates preparing for science oriented competitive exams.

Organic reactionsChemical compounds identificationAlcohol conversionCarboxylic acid propertiesIndustrial chemical applications

Alcohols, Ethers and Carboxylic Acids Questions

Multiple choice

By catalytic reduction of aldehydes, we get

  1. an alcohol with one more number of carbon atom.

  2. an alcohol with one less number of carbon atom.

  3. an alcohol with the same number of carbon atoms.

  4. an alkane.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ans : 3.

Multiple choice

The condensation reaction is concerned with the synthesis of _______ with the removal of water molecule.

  1. mono-saccharides

  2. poly-saccharides

  3. oligo-saccharides

  4. di-saccharides

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Di-saccharides are carbohydrates that are created when two mono-saccharides are joined. The creation of a di-saccharide involves the union of two mono-saccharides that undergo a process in which a water molecule is removed as part of the union. Like the two mono-saccharides that combine to form a single di-saccharide. The carbohydrate is sweet in taste and tends to dissolve in water with relative ease. The process whereby di-saccharides are created is known as dehydration synthesis or condensation reaction.

Multiple choice

In Clemmensen's reduction, acetone gives:

  1. propane

  2. propene

  3. propanol

  4. propyne

  5. none of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This option is correct, as the Clemmensen's reduction involves the reduction of aldehyde and ketone in presence of  zinc amalgam, and HCl. It produces alkanes. Acetone is reduced in to propane.

Multiple choice

Which reaction is used for the preparation of acetophenone?

  1. Reimer- Tiemann reaction

  2. Wurtz-Fitting

  3. Friedal-Craft's reaction

  4. Option 1 and 2

  5. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This option is correct because bezene is treated with acetyl chloride, in presence of anhydrous aluminium chloride to form acetophenone.

Multiple choice

Which of the following statements is/are true? A. Benzene give isobutyl benzene when reacts with isobutyl chloride in presence of anhydrous AlCl3. B. Bayer’s reagent can be used to differentiate cyclopropane from propene. C. Ethyne and its derivatives give white precipitate when reacts with ammoniacal silver nitrate solution.

  1. Only A

  2. Only B

  3. Only C

  4. Only A and B

  5. Only B and C
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This option is correct because propene decolourises Bayer’s reagent but cyclopropane being saturated does not.

Multiple choice

Which of the following statements is/are true about the reaction of p-methoxybenzaldehyde and formaldehyde in basic medium. A. Formic acid is formed when formaldehyde is oxidised. B. p-methoxybenzaldehyde is reduced to p-methoxybenzyl alcohol. C. Formaldehyde is reduced while p-methoxybenzaldehyde is oxidised.

  1. Only A

  2. Only B

  3. Only C

  4. Only A and B

  5. Only A and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This option is correct because out of HCHO and p-methoxybenzaldehyde HCHO is better reducing agent. As a result formaldehyde is oxidised to formic acid while p-methoxybenzaldehyde is reduced to p-methoxybenzyl alcohol.

Multiple choice

The oxidation of which of the following compounds gives aldehydes?

  1. Secondary alcohols

  2. Primary alcohols

  3. Tertiary alcohols

  4. Organic acids
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The oxidation of primary alcohols yields aldehydes and acids if carried to completion. In the oxidation of an alcohol, the oxidizing agent, usually represented by (O), removes the hydrogen and electrons from the alcohol, the reducing agent. The O in the oxidizing agent is some unspecified oxygen atom which reacts with the hydrogen atoms to form water.