Chapter 12 Aldehydes, Ketones, and Carboxylic Acids MCQs
Q 1.: In which of the following reactions new carbon-carbon bond is not formed ?
(A) Cannizaro reaction
(B) Aldol condensation
(C) Kolbe’s reaction
(D) Friedel Craft reaction
Option – A
Q 2.: The reagent used in Clemmensen’s reduction is
(A) Conc. H2SO4
(B) Mg-Hg / H2O
(C) Zn-Hg / Conc. HCl
(D) NH2-NH2 / KOH
Option – C
Q 3.: Which of the following does not give cannizaro’s reaction ?
(A) CCl3CHO
(B) HCHO
(C) C6H5CHO
(D) CH3CHO
Option – D
Q 4.: An organic compound ‘A’ burns with a sooty flame. It is negative towards Tollen’s reagent test and positive for Brady’s reagent test. The compound ‘A’ is
(A) Acetophenone
(B) Acetone
(C) Salicylic acid
(D) Benzaldehyde
Option – A
Q 5.: The reagent with which both acetaldehyde and acetone react is
(A) Fehling’s solution
(B) I2 / NaOH
(C) Tollen’s reagent
(D) Carbonic acid
Option – B
Q 6.: Which of the following reactions convert acetone into hydrocarbon having same number of carbon atoms ?
(A) Hofmann reaction
(B) Wolff-Kishner reaction
(C) Reduction with LiAlH4
(D) Reduction with Mg-Hg / H2O
Option – B
Q 7.: Which one of the following compounds do not give a primary alcohol on reduction ?
(A) Propanal
(B) Propanoic acid
(C) Methyl propanoate
(D) Propan-2-one
Option – D
Q 8.: Aldehydes and Ketones can be distinguished by
(A) Ammonia
(B) Alkaline KMnO4
(C) Fehling solution
(D) Acidified Potassium dichromate
Option – C
Q 9.: When ethanal is treated with Fehling’s solution, it gives a precipitate of
(A) Cu2O
(B) Cu
(C) CuO
(D) Both ‘A’ and ‘C’
Option – A
Q 10.: In the following reaction , ‘Y’ is
CH3-CO-CH2–CH3 \xrightarrow[KOH]{~N_{2}H_{4}~} Y
(A) CH3-CH2-(CH3)C=N-NH2
(B) CH3-CH2-CH2-CH3
(C) (CH3)2CH-NH2
(D) CH3-CH(OH)-CH2-CH3
Option – B
Q 11.: Identify the reaction which is used to obtain β-hydroxy ketone.
(A) Cannizaro reaction
(B) Condensation reaction
(C) Cross-cannizaro reaction
(D) Aldol condensation
Option – D
Q 12.: Formaldehyde react with ammonia to form
(A) Urotropine
(B) Methanamine
(C) Methanamide
(D) None of these
Option – A
Q 13.: Fehling A and Fehling B are
(A) CuSO4 solution and NH4OH solution
(B) CuSO4 solution and alkaline solution of sodium citrate
(C) CuSO4 solution and alkaline solution of sodium potassium tartarate
(D) CuSO4 solution and NaOH
Option – C
Q 14.: The compound, with which ethanal does not react, is
(A) HCl
(B) Cl2
(C) PCl5
(D) Aqueous NaHSO3
Option – A
Q 15.: The most reactive compound towards formation of cyanohydrin on treatment with HCN followed by acidification is
(A) Benzaldehyde
(B) p-nitrobenzaldehyde
(C) Phenylacetaldehyde
(D) p-hydroxybenzaldehyde
Option – B
Q 16.: Which of the following will respond to Cannizaro’s reaction ?
(A) Acetaldehyde
(B) Propionaldehyde
(C) Cinnamaldehyde
(D) 2,2-dimethylpropanal
Option – D
Q 17.: Name the reagent used to bring about the following transformation ; But-2-ene to ethanal
(A) Acidified K2Cr2O7
(B) CrO2Cl2 / H3O+
(C) PCC
(D) O3 / H2O-Zn dust
Option – D
Q 18.: For making distinction between Pentan-2-one and pentan-3-one, the reagent to be employed is
(A) Tollen’s reagent
(B) Benedict solution
(C) NaOH / I2 / H+
(D) NaOH / NaI / H+
Option – C
Q 19.: Formaline is the commercial name of
(A) Formic acid
(B) Fluoroform
(C) para-formaldehyde
(D) 40% aqueous solution of formaldehyde
Option – D
Q 20.: Benzaldehyde condenses with N,N-dimethylaniline in presence of anhydrous ZnCl2 to give
(A) Malachite green
(B) Michler’s ketone
(C) Azo-dye
(D) Buffer yellow
Option – A
Q 21.: A carbonyl compound reacts with hydrogen cyanide to form cyanohydrin which on hydrolysis form a racemic mixture of α-hydroxy acid. The carbonyl compound is
(A) Acetone
(B) Acetaldehyde
(C) Diethyl ketone
(D) Formaldehyde
Option – B
Q 22.: When a mixture of calcium benzoate and calcium acetate is dry distilled, the resulting compound is
(A) Benzaldehyde
(B) Benzophenone
(C) Acetaldehyde
(D) Acetophenone
Option – D
Q 23.: Ketones react with Mg-Hg over water gives
(A) Alcohols
(B) Pinacols
(C) Hydrocarbons
(D) None of these
Option – B
Q 24.: The reagent used in Gattermann Koch aldehyde synthesis is
(A) Pb/BaSO4
(B) Acidified KMnO4
(C) CO + HCl
(D) Zn-Hg / HCl
Option – C
Q 25.: Glacial acetic acid is obtained by
(A) Crystallising, separating and melting acetic acid
(B) Treating acetic acid with dehydrating agents
(C) Distilling acetic acid
(D) Chemically separating acetic acid
Option – A
Q 26.: When salicylic acid is distilled with Zn-dust, the product obtained is
(A) Benzoic acid
(B) Salicylaldehyde
(C) Zinc salicylate
(D) Phenol
Option – A
Q 27.: The product formed as a result of reaction of CH3MgBr and CO2 , on further hydrolysis gives
(A) Oxalic acid
(B) HCOOH
(C) CH3COOH
(D) CH4
Option – C
Q 28.: Which of the following compound is more acidic ?
(A) ICH2COOH
(B) BrCH2COOH
(C) ClCH2COOH
(D) FCH2COOH
Option – D
Q 29.: Oleic, stearic and palmitic acids are
(A) Amino acids
(B) Fatty acids
(C) Nucleic acids
(D) None of these
Option – B
Q 30.: Silver salt of carboxylic acid on reaction with Br2/CCl4 gives
(A) Ester
(B) Alkyl halide
(C) Aldehyde
(D) Alcohol
Option – B
Q 31.: Silver salt of carboxylic acid on reaction with R–X gives
(A) Ester
(B) Alkyl halide
(C) Aldehyde
(D) Alcohol
Option – A
Q 32.: Propionic acid and KOH reacts to produce which one of the following
(A) Propyl alcohol
(B) Propionaldehyde
(C) Potassium propionate
(D) Propene
Option – C
Q 33.: The main product obtained in the reaction of acetamide and HNO2 is
(A) CH3-CN
(B) CH3-NC
(C) CH3-NH2
(D) CH3-COOH
Option – D
Q 34.: Acid hydrolysis of which of the following compounds yields two different organic compounds ?
(A) CH3-COOH
(B) CH3-CONH2
(C) CH3-COO-C2H5
(D) (CH3CO)2O
Option – C
Q 35.: Which of the following compounds when heated with CO at 150 0C and 500 atm pressure in presence of BF3 forms ethyl propionate ?
(A) C2H5-OH
(B) C2H5-O-C2H5
(C) CH3-O-CH3
(D) CH3-O-C2H5
Option – B
Q 36.: Self-condensation of two moles of ethyl acetate in the presence of sodium ethoxide yields
(A) Acetoacetic ester
(B) Ethyl Butyrate
(C) Methyl acetoacetate
(D) Ethyl propionate
Option – A
Q 37.: Methyl acetate and Ethyl acetate can be distinguished by
(A) Hot alkaline KMnO4
(B) Neutral FeCl3
(C) Iodoform test
(D) Silver mirror test
Option – C
Q 38.: Among the following which one does not act as an intermediate in Hofmann rearrangement ?
(A) R-NCO
(B) R-CON
(C) R-CONHBr
(D) R-NC
Option – D
Q 39.: Which reaction is used for the preparation of acetophenone ?
(A) Reimer-Tiemann reaction
(B) Wurtz-fitting reaction
(C) Friedel-Craft’s reaction
(D) Cannizaro’s reaction
Option – C
Q 40.: Waxes are ester of
(A) Glycerol
(B) Long chain alcohols and long chain fatty acids
(C) Long chain alcohols
(D) Glycerol and fatty acid
Option – B