Chemistry · Science General

Alcohols, Ethers and Carboxylic Acids

391 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

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.

Multiple choice

Ethyl alcohol in liver is converted into more toxic

  1. acetaldehyde

  2. acetone

  3. both 1 and 2

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

In the liver, alcohol dehydrogenase converts ethyl alcohol into acetaldehyde, which is significantly more toxic and reactive than ethanol itself.

Multiple choice

Which component of perfume gives smell to it?

  1. Solvent

  2. Fixatives

  3. Odouriferous components

  4. Magnesium and zinc stearates
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

These are essential oils or synthetic substances or both. They constitute 2 -10% of the perfume and impart a pleasant smell to the perfume. Blending many odouriferous components will give a harmonious fragrance.

Multiple choice

Which of the following compounds reacts with tollen reagent and forms silver minor and cannot participate in aldol condensation?

  1. 3-pentanone

  2. 2, 2 dimethylpropanal

  3. 3, hydroxyl, 2-pentene

  4. Options 1 and 3 are correct

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

This option is correct because the 2, 2 dimethylpropanal reacts with  tollen reagent to form the 2, 2 dimethylpropanate and silver minor. Since, 2, 2 dimethylpropanal does not contain alpha-hydrogen, it does not undergoes aldol condensation.

Multiple choice

99.5 % of pure alcohol can be prepared by

  1. Evaporation

  2. Distillation

  3. Fractional distillation

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

Fractional distillation is the standard industrial process used to separate components of a mixture based on their different boiling points, which is necessary to achieve high purity levels like 99.5 percent.