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12th Standard Chemistry Organic Nitrogen Compounds English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021

12th Standard

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Chemistry

Time : 00:20:00 Hrs
Total Marks : 20
    Answer all the questions
    20 x 1 = 20
  1. The method by which aniline cannot be prepared is

    (a)

    degradation of benzamide with Br2 / NaOH

    (b)

    potassium salt of phthalimide treated with chlorobenzene followed by hydrolysis with aqueous NaOH solution.

    (c)

    Hydrolysis of phenylcyanide with acidic solution

    (d)

    reduction of nitrobenzene by Sn / HCl

  2. When aniline reacts with acetic anhydride the product formed is

    (a)

    o – aminoacetophenone

    (b)

    m-aminoacetophenone

    (c)

    p – aminoacetophenone

    (d)

    acetanilide

  3. (a)

    H3PO2 and H2O

    (b)

    H+/H2O

    (c)

    HgSO4/H2SO4

    (d)

    Cu2Cl2

  4. Nitrobenzene on reaction with at 80-100oC forms which one of the following products?

    (a)

    1,4 – dinitrobenzene

    (b)

    2,4,6 – tirnitrobenzene

    (c)

    1,2 – dinitrobenzene

    (d)

    1,3 – dinitrobenzene

  5. Secondary nitro alkanes react with nitrous acid to form

    (a)

    red solution

    (b)

    blue solution

    (c)

    green solution

    (d)

    yellow solution

  6. IUPAC name for the amine

    (a)

    3 – Bimethylamino – 3 – methyl pentane

    (b)

    3 (N,N – Triethyl) – 3- amino pentane

    (c)

    3 – N,N – trimethyl pentanamine

    (d)

    3– (N,N – Dimethyl amino) – 3- methyl pentane

  7. Ammonium salt of benzoic acid is heated strongly with and the product so formed is reduced and then treated with NaNO2 / HCl at low temperature. The final compound formed is

    (a)

    Benzene diazonium chloride

    (b)

    Benzyl alcohol

    (c)

    Phenol

    (d)

    Nitrosobenzene

  8. Among the following, the reaction that proceeds through an electrophilic substitution, is :

    (a)

    (b)

    (c)

    (d)

  9. Nitration of nitrobenzene results in

    (a)

    o-dinitrobenzene

    (b)

    1,3,5 trinitrobenzene

    (c)

    m-dinitrobenzene

    (d)

    p-dinitrobenzene

  10. Which of the following cannot be prepared by Sandmeyer's reaction?

    (a)

    Iodobenzene

    (b)

    Fluorobenzene

    (c)

    both Iodobenzene and Fluorobenzene

    (d)

    neither Iodobenzene and Fluorobenzene

  11. Identify the amide which will not undergo Hofmann bromamide reaction

    (a)

    CH3CONHCH3

    (b)

    CH3CH2CONH2

    (c)

    CH3CONH2

    (d)

    both CH3CH2CONH2 and CH3CONH2

  12. Nitromethane condenses with acetaldehyde to give

    (a)

    nitro propane

    (b)

    1-nitro-2-propanol

    (c)

    2-nitro-1-propanol

    (d)

    3-nitro propanol

  13. The reduction of CH3 - CH2 - C ☰ N with sodium and alcohol results in the formation of

    (a)

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

    (b)

    CH3- CH2- CH2- OH + N2

    (c)

    CH3 - CH2 - CH2 - NH2

    (d)

    CH3 - CH2 - NH2

  14. Oxidation of aniline with acidified potassium dichromate give

    (a)

    p-benzo quinone

    (b)

    benzoic acid

    (c)

    benzaldehyde

    (d)

    benzyl alcohol

  15. Aniline differs from ethylamine by the reaction with

    (a)

    metallic sodium

    (b)

    an alkyl halide

    (c)

    chloroform and caustic potash

    (d)

    nitrous acid

  16. When nitro methane condenses with acetone it gives

    (a)

    1-nitro-2-propanol

    (b)

    1-nitro-2-methoxy propane

    (c)

    1-nitro-2-methoxy-ethanol

    (d)

    1-nitro-2-methoxy-propanol

  17. The IUPAC name of the compound
    \({ CH }_{ 3 }-\underset { \overset { | }{ { CH }_{ 3 } } }{ CH } -{ CH }_{ 2 }-{ NO }_{ 2 }\)

    (a)

    1-nitro propane

    (b)

    1-nitro2-methyl propane

    (c)

    1-nito-2, 2-dimethyl propane

    (d)

    2-nitro-2-methyl propane

  18. Which of the following will not undergo Hoffman's bromamide reaction?

    (a)

    Ethanamide

    (b)

    Propanamide

    (c)

    Methanamide

    (d)

    Phenyl methanamide

  19. The intermediate formed in the nitration of benzene is _________

    (a)

    Arenium ion

    (b)

    Carbanion

    (c)

    Oxonium ion

    (d)

    Nitrite ion

  20. \({ CH }_{ 3 }-\overset { \underset { || }{ O } }{ C } -{ NH }_{ 2 }+4(H)\xrightarrow [ Na ]{ Ethanol } \) The compound is ________

    (a)

    Methylamine

    (b)

    Ethylamine

    (c)

    Dimethylamine

    (d)

    Nitro-methane

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