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

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.

Multiple choice

Denatured spirit is ethanol mixed with

  1. pyridine

  2. petrol

  3. water

  4. kerosene
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Denatured spirit is ethanol that has been rendered toxic or unpalatable by adding additives, most commonly pyridine and methanol, to deter recreational consumption.

Multiple choice

Primary alcohol is changed into an alkanal by the action of

  1. Sarett-collin's reagent

  2. Schweitzer reagent

  3. Milon reagent

  4. Hinsbergs reagent

  5. Tildon reagent
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This option is correct because the complex of chromic anhydride and pyridine is a very good oxidising agent for the conversion of primary alcohol into aldehydes.

Multiple choice

Catechol is prepared by

  1. Duff reaction

  2. Kolbe reaction

  3. Riemer-Tiemann reaction

  4. Dakin reaction

  5. Cannizzaro reaction
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This option is correct because oxidation of salicylaldehyde with alkaline hydrogenperoxide forms catechol.