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

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 columns for mixed solvent separation with high purity results-up to 99.5 percent minimum purity for selected products and a water content of under 500 parts per million.

Multiple choice

Which of the following statements is/are false? A. Dehydration of 1-methylcyclohexanol with H2SO4 gives methylenecyclohexane. B. Lewisite is obtained by addition of AlCl3 to ethyne. C. Lindlar’s catalyst is palladium supported over calcium carbonate partially poisoned by addition of lead acetate.

  1. Only A

  2. Only B

  3. A and B

  4. B and C

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

This option is correct because dehydration of 1-methylcyclohexanol with H2SO4 gives 1-methylcyclohexane and lewisite is obtained by addition of AsCl3 to ethyne in presence of anhydrous AlCl3.

Multiple choice

Assertion: 1-Butenol on dehydration with conc. H2SO4 mainly produces 1-butene. Reason: The initially formed primary carbocation rearranges to more stable secondary carbocation before losing a proton to form 2-butene as the major product.

  1. Both A and R are true and R is the correct explanation of A.

  2. Both A and R are true but R is not the correct explanation of A.

  3. A is true but R is false.

  4. A is false but R is true.

  5. Both A and R are false.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This option is correct because 1-butenol on dehydration with conc. H2SO4 mainly produces 2-butene as the major product.

Multiple choice

A 6-membered ether-containing ringed organic compound is

  1. Thromboxane

  2. Prostaglandin D2

  3. Misoprostol

  4. Platelet-activating factor
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Thromboxane is a member of the family of lipids known as eicosanoids. The two major thromboxanes are thromboxane A2 and thromboxane B2. The distinguishing feature of thromboxanes is a 6-membered ether-containing ring.

Multiple choice

Isocitric acid is converted into 2-Oxoglutaric acid by the process of

  1. oxidative decarboxylation

  2. oxidative carboxylation

  3. dehydrogenation

  4. decarboxylation and hydrogenation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Isocitrate dehydrogenase catalyzes the oxidative decarboxylation of isocitrate to 2-oxoglutarate (alpha-ketoglutarate) in the citric acid cycle. This reaction removes a carboxyl group (decarboxylation) and involves NAD+ reduction (oxidative). The enzyme requires Mn2+ or Mg2+ as cofactor.

Multiple choice

Artificial camphor is called

  1. hexachloroethane

  2. chloretone

  3. chloropicrin

  4. chloral

  5. spent lye
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This option is correct because chlorination of propane at 4000C and 74-100 atmospheric pressure forms hexachloroethane in solids. It called artificial comphor.

Multiple choice

Acetamide reacts with halogen and alkaline KOH to give

  1. methyl amine

  2. acetaldehydes

  3. acetic anhydride

  4. acetic acid

  5. dimethyl amine
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This option is correct because acetamide reacts with Br2 and KOH to give methyl amine. This reaction is called hoffmann reaction.

Multiple choice

The pair of compounds salicyldehyde and catechol are synthesised by

  1. duff and tischenko reaction

  2. duff and refomastsky reaction

  3. cannizzaro and refomastsky reaction

  4. tischenko and cannizzaro reaction

  5. duff and dakin reaction
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This option is correct because the duff reaction can also prepare salicylaldehyde by the heating of phenol with hexamethylenetetramine, glycerol and boric acid but an interesting reaction of salicylaldehyde is its oxidation with alkaline hydrogen peroxide to form catechol.

Multiple choice

Acetaldehydes are polymerized in the presence of conc. sulphuric acid to form

  1. metaformaldehydes

  2. paraformaldehydes

  3. paraldehydes

  4. mysitylene

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

This option is correct because when the polymerization of acetaldeydes is done in the presence of conc. sulphuric acid, it forms paraldehydes. It gives a pleasant smelling liquid and this is used in medicine as a hypnotic.