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11th Standard Chemistry Haloalkanes and Haloarenes English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021

11th Standard

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Chemistry

Time : 00:20:00 Hrs
Total Marks : 20

    Answer all the questions

    20 x 1 = 20
  1. Of the following compounds, which has the highest boiling point?

    (a)

    n-Butyl chloride

    (b)

    Isobutyl chloride

    (c)

    t-Butyl chloride

    (d)

    n-propyl chloride

  2. C -X bond is strongest in

    (a)

    Chloromethane

    (b)

    Iodomethane

    (c)

    Bromomethane

    (d)

    Fluoromethane

  3. Benzene reacts with Cl2 in the presence of FeCl3 and in absence of sunlight to form

    (a)

    Chlorobenzene

    (b)

    Benzyl chloride

    (c)

    Benzal chloride

    (d)

    Benzene hexachloride

  4. Assertion: In mono haloarenes, electrophilic substitution occurs at ortho and para positions.
    Reason: Halogen atom is a ring deactivator.

    (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)

    If assertion is true but reason is false

    (d)

    If both assertion and reason are false

  5. Freon-12 is manufactured from tetrachloro methane by

    (a)

    Wurtz reaction

    (b)

    Swarts reaction

    (c)

    Haloform reaction

    (d)

    Gattermann reaction

  6. The carbo cation formed in SN1 reaction of al kyl halide in the slow step is

    (a)

    sp3 hybridised

    (b)

    sp2 hybridised

    (c)

    sp hybridised

    (d)

    none of these

  7. Which one of the following is most reactive towards nucleophilic substitution reaction?

    (a)

    (b)

    (c)

    (d)

  8. Hunsdiecker reaction is used to prepare alkyl chloride and alkyl bromide starting from

    (a)

    diazonium salt

    (b)

    silver salts of carboxylic acid

    (c)

    sodium salt of carboxylic acid

    (d)

    alcohol

  9. \({ CH }_{ 3 }-{ CH }_{ 3 }-Br\overset { KCN }{ \longrightarrow } X\overset { dil.HCl }{ \underset { \triangle }{ \longrightarrow } } Z\) Z is

    (a)

    CH3CH2COOH

    (b)

    CH3COOH

    (c)

    CH3COCI

    (d)

    CH3CONH2

  10. Which of the following does not form grignard reagent on reaction with Mg in the presence of ether?

    (a)

    Chloro ethane

    (b)

    1 - Chluro propane

    (c)

    Vinyl chloride.

    (d)

    Bromo benzene

  11. Which of the following is secondary alkyl halide?

    (a)

    Iso butyl chloride

    (b)

    Isopentyl chloride

    (c)

    Neopentyl chloride

    (d)

    Isopropyl chloride

  12. Which ofthe following halogen exchange reaction will occur in acetone?

    (a)

    R-I +NaCI

    (b)

    R-F + KCI

    (c)

    R-CI +NaI

    (d)

    R- F +AgBrv

  13. Grignard reagent is prepared by between___________.

    (a)

    Zin and alkyl halide

    (b)

    Magnesium and alkyl halide

    (c)

    Magnesium and alkane

    (d)

    Copper and aromatic hydrocarbon

  14. Statement I : Primary alkyl halides on oxidation with DMSO gives aldehydes.
    Statement II : DMSO is used as polar aprotic solvent.

    (a)

    Both. statement I and statement II are true individually and statement II explains statement

    (b)

    Both statement I and statement II are true individually but statement II does not explain statement 1.

    (c)

    Only statement Iis true, but statement II is false.

    (d)

    Both statement I and II are false

  15. \({ H }_{ 3 }C-\overset { \underset { | }{ { C }_{ 2 }{ H }_{ 5 } } }{ \underset { \overset { | }{ { C }_{ 3 }{ H }_{ 7 } } }{ C } } -Cl+\overset { \ominus }{ OH } \overset { S{ N }_{ 1 } }{ \longrightarrow } { H }_{ 3 }C-\overset { \underset { | }{ { C }_{ 2 }{ H }_{ 5 } } }{ \underset { \overset { | }{ { C }_{ 3 }{ H }_{ 7 } } }{ C } } -OH+\overset { \ominus }{ Cl } \)
    What is the stereo chemistry ofthe above reaction?

    (a)

    complete racimisation

    (b)

    complete inversion

    (c)

    maximum inversion with partial racemisation

    (d)

    maximum racemisation with partial inversion

  16. For reacting with HCI, the alcohol which does not require ZnCI2 is

    (a)

    PCl3

    (b)

    PCl5

    (c)

    SOCl2

    (d)

    None of the above

  17. Match the list I with list II and select the correct answer using the code given below the lists

    List-I List-II
    A Chloromycetin 1 Malaria
    B Thyroxine 2 Typhoid Fever
    C Chloroquine 3 Anaesthetic
    D Halothane 4 Goitre
    (a)
      A B C D
    a 1 2 3 4
    (b)
      A B C D
    a 3 1 4 2
    (c)
      A B C D
    a 2 3 1 4
    (d)
      A B C D
    a 4 2 3 1
  18. How does dizzonium salt (C6H5N2+Cl-) decompose?

    (a)

    C6HSCI+N2

    (b)

    C6H5Br + N2

    (c)

    only b

    (d)

    both a& b

  19. The order of stability of the carbonium ion is__________.

    (a)

    1°> 2°>3°

    (b)

    2°> 3°>1°

    (c)

    2°> 1°>3°

    (d)

    3°>2°>1o

  20. Chlorebenzene reacts with CuCN at 523K in the presence of _____________.

    (a)

    NaOH

    (b)

    Pyrrole

    (c)

    Pyridine

    (d)

    Na

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