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Carbonyl Compounds One Mark Questions with Answer

12th Standard

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Chemistry

Time : 00:30:00 Hrs
Total Marks : 25
    25 x 1 = 25
  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. Assertion: 2,2 – dimethyl propanoic acid does not give HVZ reaction.
    Reason: 2 – 2, dimethyl propanoic acid does not have \(\alpha\) - hydrogen atom
    Codes:
    A) if both assertion and reason are true and reason is the correct explanation of assertion.
    B) if both assertion and reason are true but reason is not the correct explanation of assertion.
    C) assertion is true but reason is false
    D) both assertion and reason are false

    (a)

    if both assertion and reason are true and reason is the correct explanation of assertion.

    (b)

    if both assertion and reason are true but reason is not the correct explanation of assertion.

    (c)

    assertion is true but reason is false

    (d)

    both assertion and reason are false

  8. 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

  9. 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

  10. 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

  11. 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

  12. Which one of the following reduces tollens reagent

    (a)

    formic acid

    (b)

    acetic acid

    (c)

    benzophenone

    (d)

    none of these

  13. _______.

    (a)

    (b)

    (c)

    (d)

  14. 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

  15. Identify the product formed in the reaction

    (a)

    (b)

    (c)

    (d)

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

    (a)

    (b)

    (c)

    (d)

  17. Assertion: p – N, N – dimethyl amino benzaldehyde undergoes benzoin condensation
    Reason: The aldehydic (-CHO) group is meta directing.
    Codes:
    A) if both assertion and reason are true and reason is the correct explanation of assertion.
    B) if both assertion and reason are true but reason is not the correct explanation of assertion.
    C) assertion is true but reason is false
    D) both assertion and reason are false

    (a)

    if both assertion and reason are true and reason is the correct explanation of assertion.

    (b)

    if both assertion and reason are true but reason is not the correct explanation of assertion.

    (c)

    assertion is true but reason is false

    (d)

    both assertion and reason are false

  18. 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

  19. 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

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

    (a)

    Tollens reagent

    (b)

    Fehling’s solution

    (c)

    2,4 – dinitrophenyl hydrazine

    (d)

    semicarbazide

  21. 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

  22. 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

  23. 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)

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

  24. 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

  25. Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating?

    (a)

    (b)

    (c)

    (d)

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