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Practice on Aldehyde , Ketone and carboxylic acid


Start practice on carbonyl compound



1. Method of Prepation of Aldehyde and Ketones

1. The end product in the following sequence of reaction is


  1. Acetone
  2. Isopropyl alcohol
  3. Acetic acid
  4. Ethanol
     
ans :a

2.
Compound X , the major product, is
  1. C6H5CH3
  2. C6H5CH2Cl
  3. C6H5CHO
  4. C6H5COOH
     
ans :c

3. Which functional group is present in ethanedial ?
  1. Two aldehydic groups
  2. One Ketonic group
  3. One double bond
  4. Two double bonds
     
ans :a

4.
R is


     


ans :c

5. Acetophenone is prepared by the reaction of which of the following in the presence of AlCl3 catalyst ?
  1. Benzene and acetyl chloride
  2. Benzene and acetone
  3. Phenol and acetic acid
  4. Phenol and acetone
     
ans :a

6.Methyl ethyl Ketone is prepared by oxidation of
  1. 2-propanol
  2. 1-butanol
  3. t-butyl alcohol
  4. 2-butanol
     
ans :d

7.
B is
  1. eythanol
  2. an aldehydea
  3. an acid
  4.  ketone
     
ans :c

2. Nucleophilic Addition Reactions

1.


     
ans :a

2.

Select the product for the following 


  1. III
  2. I, III
  3. I, II 
  4. II ,III
     
ans :c

3.  Reaction of acetaldehyde with HCN followed by hydrolysis gives a compound which shows
  1. Tautomerism
  2. Geometrical isomerism
  3. Metamerism
  4. Optical isomerism
     
ans :d

4.  Which of the aldehyde is most reactive ?


     
ans :b

5. Cyanohydrin of which of the following forms lactic acid ?


     
ans :c

6. Glycine may be classed as all of the following , except 
  1. a base 
  2. optically active acid
  3. a zwitter ion
  4. an acid
     
ans :b

3. Aldol condensation

1.


     
ans :a

2. Which of the following will not show aldol condensation ?
  1. Acetaldehyde
  2. Propanaldehyde
  3. Benzaldehyde
  4. Trideuteroacetaldehyde
     
ans :c

3.  Which of the following gives aldol condensation reaction ?


     
ans :a

4. Propanal on treatment with dilute sodium hydroxide forms


     
ans :b

5. Which of the following would undergo aldol condensation ?


     
ans :b

6.  In a mxed aldol condensation with ethanal as one aldehyde , which other from the following is expected to give maximum yield of cross condensation product ?


     
ans :b

4. Oxidation and Reduction of Carbonyl Compound

1. The reagent with which both acetaldehyde and acetone react easily is
  1. Fehling's reaction
  2. Grignard reagent
  3. Schiff's reagent
  4. Tollen's reagent
     
ans :b

2. Ketones can be oxidized to esters by
  1. acidic KMnO4
  2. iodoform reaction
  3. Baeyer-Villiger oxidation
  4. none of these
     
ans :c

3. A compound [A] has the molecular formula C2Cl3OH . It reduces Fehling's solution and on oxidation gives a monocarboxylic acid [B] . [A] is obtained by the action of Cl2 on ethyl alcohol . [A] is
  1. Chloral
  2. chloroform
  3. chloromethane
  4. chloroacetic acid
     
ans :a

4.  Reduction  >C=O  to CH2 can be carried out with 
  1. Catalytic reduction
  2. Na/C2H5OH
  3. LiAlH4
  4. Wolf-Kishner reduction
     
ans :d

5.  C2H5CHO  and  (CH3)2 can be distinguished by testing with
  1. phenyl hydrazine
  2. Fehling solution
  3. hydroxylamine
  4. sodium bisulfite
     
ans :b

6. Silver mirror is a test for
  1. Ethers 
  2. Thio alcohols
  3. Amines
  4. Aldehydes
     
ans :d

7.  Acetaldehyde and acetone can be distinguished by
  1. Molisch's test
  2. Tollens' test
  3. solubility in water
  4. bromoform test
     
ans :b

8. A compound has a vapour density of 29. On warning an aqueous solution of alkali, it gives a yellow presipitate the compound is


     
ans :d


9.  A compound A→C5H10Cl2 on hydrolysis gives C5H10O , which reacts with NH2OH to form iodoform , but does not give Fehling's  test . A is


     
ans :d

5. Cannizaro's Reaction 

1.
If D is deuterium, the products formed are



     
ans :b

2. Formaldehyde when treated with KOH gives mrthanol and potassium formate . The reaction known as
  1. Perkin reaction 
  2. Canninzzaro reaction
  3. Clasien reaction
  4. Knoevenagel reaction
     
ans :b

3. The aldehyde that react with NaOH to produce an alcohol and sodium salt is


     
ans :d

4. What is the major organic product formed in the following reaction ?


     
ans :c

5.  What is the major product formed in the following intramolecular Canninzaro reaction ?




     
ans :c

6. Reactions of Aldehydes and Ketones

1. Acetaldejyde reacts with phosphorus pentachloride to produce
  1. ethylene chloride
  2. ethylidene chloride
  3. ethyl chloride
  4. trichloroacetaldehyde
     
ans :b

2.  2,3-Dimethyl butane -2,3-diol(pinacol) on treatment with hot dilute H2SO4 yields
  1. 3,3-dimethyl butan-2-one 
  2. 2,3-dimethyl butanal
  3. 2-methyl pentan-2-one
  4. none of these
     
ans :a

3. What will be the products in the reaction given below ?


     
ans :b

4.  Benzyl alcohol and sodium benzoate is obtained by the action of sodium hydroxide on benzaldehyde. This reaction is known as
  1. Perkin's reaction
  2. Sandmeyer's reaction
  3. Cannizzaro's reaction
  4. Claisen condensation
     
ans :c

5. Formaldehyde reacts with ammonia to give urotropine. The formula for urotropine is
  1. (CH2)6N6
  2. (CH2)4N3
  3. (CH2)6N4
  4.  (CH2)3N3
     
ans :c

6. The reaction C6H5CHO + CH3CHO → C6H5CH=CH―CHO is known as
  1. Claisen condensation
  2. Perkin's reaction
  3. Benzoin condensation
  4. Cannizzaro's reaction
     
ans :a

7. When acetaldehyde reacts with PCls,the resulting compound is
  1. ethyl chloride
  2. ethylidene chloride
  3. ethylene chloride
  4. trichloro acetaldehyde
     
ans :b

8. Benzaldehyde reacts with ammonia to form
  1. hydrobenzamide
  2.  urotropine
  3. benzaldehyde ammonia
  4. aniline
     
ans :a

9. Which of the following compound will react with ethanolic KCN?
  1. Benzaldehyde
  2.  Acetyl chloride
  3. Chlorobenzene
  4. Ethane
     
ans :a

10. Ketones react with Mg/Hg over water gives
  1. pinacolone
  2. alcohols
  3.  pinacols
  4. none of these
     
ans :c

11. Tishchenko reaction yields ester in the presence of catalyst which is
  1. LiAlH4
  2. Al(OC2H5)3
  3. N-bromosuccinamide
  4. Zn-Hg/HCI
     
ans :b

12. Two moles of acetic acid are heated with P2O5.The product formed is
  1. acetic anhydride
  2. formic anhydride
  3. 2 mol of ethyl alcohol
  4. 2 mol of methyl cyanide
     
ans :a

13. o-Xylene when oxidized in the presence of V2O5,the product is
  1. benzoic acid
  2. phthalic acid
  3. phenyl acetic acid
  4. acetic acid
     
ans :b

14. Which reaction is used for the preparation of o-bromoacetic acid?
  1. Hell-Volhard-Zelinsky reaction
  2. Reimer-Tiemann reaction
  3. Kolbe's reaction
  4. perkin's reaction
     
ans :a

15. Saponification of ethyl benzoate with caustic soda as alkali gives
  1. benzyl alcohol and ethanoic acid
  2. phenol and ethanoic acid
  3. benzoic and sodium ethoxide
  4. sodium benzoate and ethanol
     
ans :d

7. Carboxylic Acid

1. Consider the following sequence of reactions :




     
ans :b

2.
P can be


     
ans :b

3.  What is compound Z ?




     
ans :d

4. End product of the following sequence of reaction is





     
ans :b

5. The strongest acid among the following is


     
ans :a

6. Which of the following carboxylix acid undergoes decarboxylation easily ?


     
ans :a

7. Which of the following structure of carboxylic acid accounts for the acidic nature ?


     
ans :c

8. Which of the following acids is isomeric with phthalic acid ?
  1. 1,4-benzene dicarboxylic acid
  2. Salicylic acid
  3. Succinic acid
  4. Methyl benzoic 
     
ans :a

9.  When succinic acid is heated, product formed is 
  1. Propionic acid
  2. Acetic acid
  3. CO2 and methane
  4. Succinic anhydride
     
ans :d

10. Which of these do not contain —COOH group?
  1. Aspirin
  2. Picric acid
  3. Benzoic acid
  4. Salicylic acid
     
ans :b

11.
The compound (X) is


     
ans :b

12. Which one is strongest acid ?


     
ans :a

13.  Which of the following would be expected to be most highly ionized in water ?


     
ans :b

14. 
Compound Y is



     
ans :b

15.

Where Z is ?



     
ans :d

16. Benzoic acid gives benzene on being heated with X and phenol gives benzene heated with Y. Therefore, X and Y are, respectively
  1. Soda lime and Zinc dust
  2. Zinc dust and NaOH
  3. Zinc dust and soda lime
  4. Soda lime and copper
     
ans :a

17. Which one of the following has the maximum acid strength ? 
  1. p-nitrophenol
  2. m-nitrobenzoic acid
  3. p-nitrobenzoic acid
  4. o-nitrobenzoic acid
     
ans :d

18.  Acetic anhydride reacts with diethyl ether in the presence of anhydrous AlCl3 to form
  1. Peopionic acid
  2. Methyl propionate
  3. Methyl acetate
  4. Ethyl acetate
     
ans :d

8. Carboxylic derivative

1. What will happen if LiAlH4 is added to an ester ?
  1. Two units of acids are obtained
  2. One unit of alcohol and one unit of acid are obtained
  3. Two inits of alcohol are obtained
  4. None of these
     
ans :c

2.  Arrange the following in the order of increasing reactivity toward nucleophilic substitution reaction :


  1.  1 < 2 < 3
  2. 3 < 1 < 2
  3. 1 < 3 < 2
  4. 2 < 1 < 3
     
ans :b

3. The reagent that does not give acid chloride on treating with a carboxylic acid is
  1. PCl5
  2. SOCl2
  3. Cl2
  4. PCl3
     
ans :c

4. 
Above reaction is an example of
  1. Esterification
  2. Saponification
  3. Hydrolysis
  4. Transesterification
     
ans :d

5. Which one among the following represents an amide ?

     
ans :a

6.  Acetic anhydride is obtained from acetyl chloride by the reaction of 
  1. P2O5
  2. CH3COONa
  3. H2SO4
  4. CH3COOH
     
ans :b

7. The order of hydrolysis for the following is

  1.  IV > III > II > I
  2. I > II > III > IV
  3. I > III > II > IV
  4. I > IV > II > III
     
ans :d

8.  C6H5CONHCH3 can be converted into C6H5CH2NHCH3 by
  1. PCl5
  2. SOCl2
  3. LiAlH4
  4. NaBH4
     
ans :a

9. Mixed Concepts

1.
Product is


     
ans :d

2. End product of the following sequence of reaction is




     
ans :b

3. In the following compound , the correct order of the acidity of the position X , Y and Z is


  1. X > Y > Z
  2. Z > X > Y
  3. X > Z > Y
  4. Y > X > Z
     
ans :a

4.  The end product of this conversion is




     
ans :a

5.  Salicyclic acid is treated with bromine under two different conditions .

Predict the nature of [X] and [Y] in the above reactions.



     
ans :c

6. Arrange the following alcohols in increasing order of  acid-catalyzed esterification by ethanol.


  1.  A < B < C
  2. C < B < A
  3. B < C < A
  4. C < A < B
     
ans :a

7. Which of the following acids has the smallest dissociation constant ?


     
ans :c

8.  Which of the following  carboxylic acids decarboxylate easily ?


     
ans :c

9.  The correct stability order of the following three quinones is


  1.  I > III > II
  2. I = III > II
  3. I = II > III
  4. III > I > II
     
ans :d

10.  The appropriate reagent for the following transformation :


  1.  Zn(Hg) , HCl
  2. NH2NH2 , OH -
  3. H2/Ni
  4. NaBH4
     
ans :b

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