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

Aldol condensation will not occur in

  1. HCHO

  2. CH3CH2CHO

  3. CH3COCH3

  4. CH3CHO

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

This option is correct. The carbonyl compounds have at least one alpha-hydrogen atom. So, formaldehyde does not give aldol condensation.

Multiple choice

Allyl alcohol changes into acrolien with the help of

  1. azobisisobutyronitrile (AIBN) reagent

  2. burgess reagent

  3. the Jone's reagent

  4. tollen reagent

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

This option is correct because Jone's reagent is the solution of chromium trioxide in diluted sulphuric acid. This reagent is prepared from soduim dichromate and potassium dichromate,  which is especially used for the oxidation of secondary alcohol to ketones and primary alcohol, and then into carboxlyic acid and in few cases into aldehydes.

Multiple choice

Methyl alcohol is prepared industrially from

  1. C2H5OH

  2. CH3COOH

  3. CO + H2

  4. CH3COCH3

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

This option is correct because water gas can be used to prepare methyl alcohol industrially in the presence of ZnO + Cr2O3 + CuO at 400-4500C.

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

Oil forming soap on reacting with NaOH is:

  1. rose oil

  2. paraffin oil

  3. kerosene oil

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

Peanut oil is an organic material oil derived from peanuts, noted to have the aroma and taste of its parent legume. Peanut oil is appreciated for its high smoke point relative to many other cooking oils. Its major component fatty acids are oleic acid (56.6%) and linoleic acid (26.7%).[citation needed]. The oil also contains some palmitic acid, arachidic acid, arachidonic acid, behenic acid, lignoceric acid and other fatty acids.It forms soap on reaction with NaOH.

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.