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 Multiple Choice QuestionsMultiple Choice Questions

261.

(CH3)2CO HClNaCN A H3O+ B. In the above sequence of reactions, A and B respectively are

  • (CH3)2C(OH)CN, (CH3)2CHCOOH

  • (CH3)2C(OH)CN, (CH3)2C(OH)2

  • (CH3)2C(OH)CN,(CH3)2C(OH)COOH

  • (CH3)2C(OH)CN,(CH3)2C=O


262.

Glacial acetic acid is obtained by

  • chemically separating acetic acid

  • treating vinegar with dehydrating agents

  • crystallising, separating and melting acetic acid

  • distilling vinegar


263.

An organic acid without a carboxylic acid group is

  • picric acid

  • oxalic acid

  • vinegar

  • ascorbic acid


264.

An ester used as medicine is

  • ethyl benzoate

  • methyl salicylate

  • methyl acetate

  • ethyl acetate


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265.

Reaction of aniline with benzaldehyde is

  • polymerisation

  • condensation

  • addition

  • substitution


266.

Match List-I with List-II and select the correct answer using the codes given below:

List I (Name reaction) List II (Reagent/ Catalyst)
A. Tischenko's reaction 1. SnCl2/ HCl
B. Baeyer- villiger oxidation 2. Zn/Hg, conc.HCl
C. Stephen's reduction 3. (C2H5O)3Al
D. Clemmensen reduction 4. H2SO5

  • A   B   C  D

    4   3   1   2

  • A  B  C   D

    3  4   1   2

  • A  B  C  D

    1  3   2  4

  • A  B  C  D

    3  2   4  1


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267.

CH3COOH APCl5[B]CH3COOH ANaOH[C][B] + [C] [D] ompounds [B], [C] and [D] are

  • Acetyl Chloride, Acetic anhydride and Sodium acetate
    [B]                        [C]                       [D]

  • Sodium acetate, Acetic anhydride and Acetyl chloride
    [B]                      [C]                            [D]

  • Acetyl chloride, Sodium acetate and Acetic anhydride
    [B]                     [C]                         [D]

  • Acetic anhydride, Acetyl chloride and Sodium acetate
    [B]                      [C]                          [D]        


C.

Acetyl chloride, Sodium acetate and Acetic anhydride
[B]                     [C]                         [D]

The given reactions occur as follows

(i) CH3COOH[A] PCl5 CH3COCl[B](Acetyl chloride)(ii) CH3COOH[A] NaOH CH3COON-+a[C] Sodium acetate(iii)  CH3COCl[B](Acetyl chloride) + CH3COON-+a[C] Sodium acetate  (CH3CO)2O( Acetic anhydride)[D]Hence, [B] = Acetyl chloride [C] = Sodium acetate [D] = Acetic anhydnde


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268.

Methanal is

  • CH3CHO

  • CH3COCH3

  • CH2OH

  • HCHO


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269.

Consider the following reaction

CHCH + 2[O] SeO2[A]

The product [A] is

  • HCOOH (formic acid)

  • CH3COOH  (acetc acid)

  • CHO-CHO (glyoxal)

  • C2O4H2 (oxalic acid)


270.

Iodoform test is not answered by

  • C2H5OH

  • CH3OH

  • CH3COCH3

  • CH3-CH(OH)-CH3


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