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

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.

Multiple choice

Gasohol is prepared by mixing gasoline and

  1. methyl alcohol

  2. tetraethyl lead

  3. ethyl alcohol

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

Gasohol is a fuel mixture consisting of gasoline and ethanol. Ethyl alcohol is the common name for ethanol, which is added to gasoline to improve octane ratings and reduce emissions.

Multiple choice

Directions: The following question has four choices out of which ONLY ONE is correct.

Which of the following functional compounds do not give Schotten-Baumann reaction?

  1. Alcohols

  2. Phenols

  3. Amines

  4. Ether
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Schotten-Baumann reaction is the acyclation of alcohols, phenols and amines, and not ethers, by shaking with aromatic acyl chloride in the presence of a base, usually aqueous sodium hydroxide. Hence, this test is not given by ethers.

Multiple choice

Which of the following mixtures is/are azeotropic?

  1. Power alcohol

  2. Denaturated alcohol

  3. Proof spirit

  4. Rectified spirit

  5. Both (3) and (4)

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

This option is correct because rectified spirit contains 95.87% ethyl alcohol and 4.13% water. It cannot be converted into absolute alcohol.  This mixture is an azeotropic mixture.

Multiple choice

Elbs persulfate reaction synthesises

  1. benzyl alcohol and soda-benzoate

  2. catechol

  3. catechol and quinol

  4. methylsalicylate

  5. quinol
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This option is correct because  phenol is oxidised in presence of potassium persulphate and alkaline solution to form catechol and quinol.

Multiple choice

Birnbaurn reaction is given by

  1. benzyl alcohol

  2. ether

  3. ethyl iodide

  4. ester

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

This option is correct because when silver methanoate is treated with iodine, ester is formed and  carbon dioxide is evolved.