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Carbonyl Compounds 1 Mark Book Back Question Paper With Answer Key

12th Standard

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Chemistry

Time : 00:22:00 Hrs
Total Marks : 22

    Multiple Choice Question 

    22 x 1 = 22
  1. The correct structure of the product ‘A’ formed in the reaction ______.

    (a)

    (b)

    (c)

    (d)

  2. The formation of cyanohydrin from acetone is an example of _______.

    (a)

    nucleophilic substitution

    (b)

    electrophilic substitution

    (c)

    electrophilic addition

    (d)

    Nucleophilic addition

  3. Reaction of acetone with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is _______.

    (a)

    Grignard reagent

    (b)

    Sn / HCl

    (c)

    hydrazine in presence of slightly acidic solution

    (d)

    hydrocyanic acid

  4. In the following reaction, \(HC\equiv CH \overset { { H }_{ 2 }{ SO }_{ 4 } }{ \underset { HgS{ O }_{ 4 } }{ \longrightarrow } } X\) Product ‘X’ will not give _______.

    (a)

    Tollen’s test

    (b)

    Victor meyer test

    (c)

    Iodoform test

    (d)

    Fehling solution test

  5. \({ CH }_{ 2 }={ CH }_{ 2 }\overset { i){ O }_{ 3 } }{ \underset { zn/{ H }_{ 2 }O }{ \longrightarrow } } X\overset { { NH }_{ 3 } }{ \longrightarrow } Y \ 'Y'\) is _______.

    (a)

    Formaldelyde

    (b)

    di acetone ammonia

    (c)

    hexamethylene tetraamine

    (d)

    oxime

  6. Predict the product Z in the following series of reactions Ethanoic acid \(\overset { { PCI }_{ 5 } }{ \longrightarrow } X\overset { { C }_{ 6 }{ H }_{ 6 } }{ \underset { Anhydrous \ AlCI }-_{3}{ \longrightarrow } } Y\overset { 1){ CH }_{ 3 }MgBr }{ \underset { II){ H }_{ 3 }{ O }^{ + } }{ \longrightarrow } } Z.\)

    (a)

    (CH3)2 C(OH)C6H5

    (b)

    CH3CH(OH)C6H5

    (c)

    CH3CH(OH)CH2- CH3

    (d)

  7. Which of the following represents the correct order of acidity in the given compounds

    (a)

    FCH2COOH > CH3COOH > BrCH2COOH > ClCH2COOH

    (b)

    FCH2COOH > ClCH2COOH > BrCH2COOH > CH3COOH

    (c)

    CH3COOH > ClCH2COOH > FCH2COOH > Br-CH2COOH

    (d)

    Cl CH2COOH > CH3COOH > BrCH2COOH > ICH2COOH

  8. Benzoic acid \(\overset { i){ NH }_{ 3 } }{ \underset { ii)\Delta }{ \longrightarrow } } A\overset { NaOBr }{ \longrightarrow } B\overset { NaN{ O }_{ 2 }/HCl }{ \longrightarrow } \) C 'C'  is ______.

    (a)

    anilinium chloride

    (b)

    O – nitro aniline

    (c)

    benzene diazonium chloride

    (d)

    m– nitro benzoic acid

  9. Ethanoic acid \(\overset { P/{ Br }_{ 2 } }{ \longrightarrow } \) 2-bromoethanoic acid. This reaction is called _______.

    (a)

    Finkelstein reaction

    (b)

    Haloform reaction

    (c)

    Hell – Volhard – Zelinsky reaction

    (d)

    none of these

  10. CH3Br \(\overset { KCN }{ \longrightarrow } (A)\overset { { H }_{ 2 }{ O }^{ + } }{ \longrightarrow } (B)\overset { { PCl }_{ 5 } }{ \longrightarrow } \) (C) product (c) is ______.

    (a)

    acetylchloride

    (b)

    chloro acetic acid

    (c)

    \(\alpha\)- chlorocyano ethanoic acid

    (d)

    none of these

  11. Which one of the following reduces tollens reagent

    (a)

    formic acid

    (b)

    acetic acid

    (c)

    benzophenone

    (d)

    none of these

  12. _______.

    (a)

    (b)

    (c)

    (d)

  13. The IUPAC name of 

    (a)

    but – 3- enoicacid

    (b)

    but – 1- ene-4-oic acid

    (c)

    but – 2- ene-1-oic acid

    (d)

    but -3-ene-1-oicacid

  14. Identify the product formed in the reaction

    (a)

    (b)

    (c)

    (d)

  15. In which case chiral carbon is not generated by reaction with HCN?

    (a)

    (b)

    (c)

    (d)

  16. Which one of the following reaction is an example of disproportionation reaction.

    (a)

    Aldol condensation

    (b)

    cannizaro reaction

    (c)

    Benzoin condensation

    (d)

    none of these

  17. Which one of the following undergoes reaction with 50% sodium hydroxide solution to give the corresponding alcohol and acid.

    (a)

    Phenylmethanal

    (b)

    ethanal

    (c)

    ethanol

    (d)

    methanol

  18. The reagent used to distinguish between acetaldehyde and benzaldehyde is _______.

    (a)

    Tollens reagent

    (b)

    Fehling’s solution

    (c)

    2,4 – dinitrophenyl hydrazine

    (d)

    semicarbazide

  19. Phenyl methanal is reacted with concentrated NaOH to give two products X and Y. X reacts with metallic sodium to liberate hydrogen X and Y are ________.

    (a)

    sodium benzoate and phenol

    (b)

    Sodium benzoate and phenyl methanol

    (c)

    phenyl methanol and sodium benzoate

    (d)

    none of these

  20. In which of the following reactions new carbon – carbon bond is not formed?

    (a)

    Aldol condensation

    (b)

    Friedel craft reaction

    (c)

    Kolbe’s reaction

    (d)

    Wolf kishner reduction

  21. An alkene “A” on reaction with O3 and Zn - H2O gives propanone and ethanol in equimolar ratio. Addition of HCl to alkene “A” gives “B” as the major product. The structure of product “B” is ______.

    (a)

    \(Cl-{ CH }_{ 2 }-CH_{ 2 }-\overset { \overset { CH_{ 3 } }{ | } }{ \underset { \underset { CH_{ 3 } }{ | } }{ CH } } \)

    (b)

    \({ H }_{ 3 }C-{ CH }_{ 2 }-\overset { \overset { CH_{ 2 }Cl }{ | } }{ CH } -{ CH }_{ 3 }\)

    (c)

    \(\\ { H }_{ 3 }C-{ CH }_{ 2 }-\overset { \overset { CH_{ 3 } }{ | } }{ \underset { \underset { CL{ } }{ | } }{ C } } -{ CH }_{ 3 }\)

    (d)

    \({ H }_{ 3 }C-{ CH }-\overset { \overset { CH_{ 3 } }{ | } }{ \underset { \underset { Cl }{ | } }{ C } } \)

  22. Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their ________.

    (a)

    more extensive association of carboxylic acid via van der Waals force of attraction

    (b)

    formation of carboxylate ion

    (c)

    formation of intramolecular H-bonding

    (d)

    formation of intermolecular H – bonding

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