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
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The Nysted reagent
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The Tebbe reagent
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An Olah reagent
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An Organolithium reagent
A
Correct answer
Explanation
The Nysted reagent is used for the olefination of ketones and aldehydes.
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Eschenmoser's salt
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Reinecke's salt
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Frémy's salt
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Cornforth salt
D
Correct answer
Explanation
The Cornforth salt or pyridinium dichromate (PDC) is a pyridinium salt of dichromate. It is a strong oxidizing agent which can convert primary and secondary alcohols to ketones. In its chemical structure and functions, it is closely related to other compounds made from hexavalent chromium oxide, such as pyridinium chlorochromate and Collins reagent.
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Acetone
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Toluene
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Acrylamide
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Phenol
B
Correct answer
Explanation
The pure and effective chemical, Toluene, is also known as methyl benzene. This aromatic hydrocarbon is widely used as a solvent and an industrial feedstock. Due to its intoxicating attributes, it is widely used as inhalant drug such as other solvents. Toluene is a clear water-insoluble liquid that smells like paint thinners.
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Methanol
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PG (Propylene Glycol)
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Citric Acid
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Ethyl Acetate
C
Correct answer
Explanation
Citric Acid is widely known for its toxic elements and accurate composition. This anhydrous acts as a natural preservative, which is used to enhance sour or acidic taste in soft drinks and foods. Moreover, due to its varied properties, this acid is extensively used as an environmentally benign cleaning agent.
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Webster's reagent
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Woollins' reagent
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Nysted reagent
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Tebbe reagent
D
Correct answer
Explanation
The Tebbe reagent is the organometallic compound. It is used in the methylenation of carbonyl compounds, which means that it converts organic compounds containing R2C=O group into the related R2C=CH2 derivative.
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Triethyl orthoacetate
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Triethyl phosphonoacetate
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Triethyloxonium tetrafluoroborate
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Dimethyl malonate
A
Correct answer
Explanation
Triethyl orthoacetate is the ethyl orthoester of acetic acid. It is also known as 1,1,1-triethoxyethane, and is an oily liquid with a colour that is anywhere from yellow to colourless. It is used in organic synthesis for the introduction of the acetate group to an alcohol. It is also used in the Johnson-Claisen rearrangement.
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Acetyl chloride
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AD-mix
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Anhydrous aluminium trichloride
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Armstrong's acid
D
Correct answer
Explanation
Armstrong's acid is a strong acid which is related to toluenesulphonic acid and is used in chemical synthesis. It is sometimes used as a divalent counterion for forming salts of basic drug compounds, as an alternative to the related mesylate or tosylate salts.
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9-Borabicyclo[3.3.1]nonane
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1,2-Ethanedithiol
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Benzyltrimethylammonium fluoride
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Benzyltrimethylammonium hydroxide
D
Correct answer
Explanation
Benzyltrimethylammonium hydroxide, also known as Triton B or trimethylbenzylammonium hydroxide, is an organic base. It is used in aldol condensation reactions and base-catalyzed dehydration reactions.
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The Cornforth reagent
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The Collins reagent
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The Nysted reagent
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The Olah reagent
A
Correct answer
Explanation
The Cornforth reagent is a strong oxidizing agent which can convert primary and secondary alcohols to ketones. In its chemical structure and functions, it is closely related to other compounds made from hexavalent chromium oxide, such as pyridinium chlorochromate and Collins reagent.
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Diethylaminosulphur trifluoride
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Diethylzinc
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Diisopinocampheylborane
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2,2-Dimethoxypropane
C
Correct answer
Explanation
Diisopinocampheylborane is an organoborane that is useful for asymmetric synthesis. This colourless solid is the precursor to a range or related reagents. The reagent is mainly used for the synthesis of chiral secondary alcohols.
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iodobenzene dichloride
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2-iodoxybenzoic acid
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lithium bis(trimethylsilyl)amide
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lithium diisopropylamide
B
Correct answer
Explanation
IBX acid or 2-iodoxybenzoic acid is an organic compound used in organic synthesis as an oxidising agent. This Periodinane is especially suited to oxidise alcohols to aldehydes.
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dimethoxymethane
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dioxolane
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metaldehyde
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paraldehyde
B
Correct answer
Explanation
Dioxolane is an heterocyclic acetal. It is related to tetrahydrofuran by interchange of one oxygen for a CH2 group. The corresponding saturated 6-membered C4O2 rings are called dioxanes. The isomeric 1,2-dioxolane (wherein the two oxygen centers are adjacent) is an peroxide. 1,3-dioxolane is used as a solvent and as a comonomer in polyacetals.
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Acrolein, Vinyl chloride, Acrylonitrile
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Glycerol, Cyclohexane, Acrolein
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Glycerol, Acrolein, Vinyl chloride
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Acrolein, Glycerol, Acrylonitrile
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Glycerol, Cyclohexane, Vinyl chloride
D
Correct answer
Explanation
This option is correct because Acrolein, glycerol and acrylonitrile are derived from propylene.
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The Monsanto process
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The Shell higher olefin process
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Olefin metathesis
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Alkane metathesis
A
Correct answer
Explanation
The Monsanto process is an important method for the manufacture of acetic acid by catalytic carbonylation of methanol. This process operates at a pressure of 30-60 atm and a temperature of 150-200 °C and gives a selectivity greater than 99%.
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The Monsanto process
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The Shell higher olefin process
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Olefin metathesis
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Silylmetalation
A
Correct answer
Explanation
The Monsanto process is an important method for the manufacture of acetic acid by catalytic carbonylation of methanol. This process operates at a pressure of 30-60 atm and a temperature of 150-200 °C and gives a selectivity greater than 99%.