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

Which of the following is incorrect about Green Solvents?

  1. Glycerol carbonate can be used as non-reactive diluents in epoxy or polyurethane systems

  2. 2-ethylhexyl lactate can be used for protection of paddy rice crops

  3. Super critical carbon dioxide is used in polymer applications

  4. Instead of using Lewis acids for Friedal Craft acylation we use ionic liquids as solvents
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This option is correct because instead of using Lewis Acids for Friedal Craft Acylation we use 'Near-Critical' water which is very hot but still liquid water at temperatures of 250ᵒC to 300ᵒC and pressure of 6.89 MPa.

Multiple choice

Which of the following can be used to sterilize the heat labile instruments for use in surgical procedures?

  1. Absolute alcohol

  2. Ultraviolet rays

  3. Chlorine-releasing compounds

  4. Ethylene oxide gas
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Mechanism of Action - Alkylation of amino, carboxyl, etc., group of proteins. Use: To sterilized heat-labile instruments  like dental equipment, heart lung machines, etc. Disadvantage: It is potentially mutagenic and carcinogenic.

Multiple choice

Which of the following compounds is used in wood polish and varnish?

  1. Methane

  2. Acetaldehyde

  3. Methyl alcohol

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

Methane - It is used for making printing inks and black paints. Acetaldehyde - It is used in the manufacture of acetic acid and dyes. Methyl alcohol - It is used as a solvent for wood polish and varnish. Acetic acid - It is used as a preservative when mixed with water, e.g. vinegar.

Multiple choice

Which one of the following compounds is used as a sedative?

  1. potassium bromide

  2. calcium chloride

  3. ethyl alcohol

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

Potassium bromide is a sedative because bromide ions (Br-) have a calming effect on the central nervous system. Historically, bromide salts were widely used as sedatives and anticonvulsants. Calcium chloride is used in de-icing and as a calcium supplement. Ethyl alcohol is a depressant but not classified as a sedative drug. Phosphorus trichloride is a reactive chemical used in synthesis.

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.