Haloalkanes and Haloarenes Important Questions

11th Standard

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Chemistry

Time : 01:00:00 Hrs
Total Marks : 50

    Part A

    10 x 1 = 10
  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. In the reaction  X is ________.

    (a)

    (b)

    (c)

    (d)

  3. The name of C2F4Cl2 is ___________

    (a)

    Freon – 112

    (b)

    Freon – 113

    (c)

    Freon – 114

    (d)

    Freon – 115

  4. Freon-12 is manufactured from tetrachloro methane by

    (a)

    Wurtz reaction

    (b)

    Swarts reaction

    (c)

    Haloform reaction

    (d)

    Gattermann reaction

  5. Silverpropionate when refluxed with Bromine in carbontetrachloride gives

    (a)

    propionic acid

    (b)

    chloro ethane

    (c)

    bromo ethane

    (d)

    chloro propane

  6. The best reagent for converting an alcohol into the corresponding chloride is

    (a)

    PCl3

    (b)

    PCl5

    (c)

    SOCl2

    (d)

    HCl/ZnCl2​​​​​​​

  7. Ethyl bromide reacts with sodium lead alloy to form_____________.

    (a)

    Chloro ethane

    (b)

    1 - Chluro propane

    (c)

    Vinyl chloride.

    (d)

    Bromo benze

  8. For reacting with HCI, the alcohol which does not require ZnCl2 is

    (a)

    CH3 CH2 OH

    (b)

    CH3-CH2 CH2 OH

    (c)

    CH3-CH OH

    (d)

    (CH3)3 C - OH

  9. Mild oxidation of benzyl chloride with Cu(NO3)Z gives,

    (a)

    Benzoic acid

    (b)

    Benzene

    (c)

    benzaldehyde

    (d)

    Benzyl alcohol

  10. Chloropicrin is prepared by adding nitric acid to______________,

    (a)

    CCl4

    (b)

    CH3CI

    (c)

    CH3CI3

    (d)

    None

  11. Part B

    5 x 2 = 10
  12. Why chlorination of methane is not possible in dark?

  13. Write down the possible isomers of C5H11Br and give their IUPAC and common names.

  14. Explain the preparation of the following compounds
    i) DDT ii) Chloroform
    iii) Biphenyl
    iv) Chloropicrin
    v) Freon-12

  15. Write a note on carbylamine reaction.

  16. Write the isomers of the compound whose molcular formula is C4H9Br.

  17. Part C

    5 x 3 = 15
  18. An organic compound (A) with molecular formula C2H5Cl reacts with KOH gives compounds (B) and with alcoholic KOH gives compound (C). Identify (A),(B), and (C)

  19. Two isomers (A) and (B) have the same molecular formula C2H4Cl2. Compound (A) reacts with aqueous KOH gives compound (C) of molecular formula C2H4O. Compound (B) reacts with aqueous KOH gives compound(D) of molecular formula C2H6O2. Identify (A), (B), (C) and (D).

  20. Haloalkanes produce mixture of olefins- say true or false and justify yoyr answer,

  21. Among ortho, meta and para substituted diahalobenzenes which has high melting point? Give reason with example.

  22. Ahydroarbon C5H10 does not react with chlorine In dark but gives C5H9CI in bright sunlight. Identify the hydrocarbon.

  23. Part D

    3 x 5 = 15
  24. Explain the mechanism involved in bimolecular nucleophilic substitution reaction.

  25. How will you convert t-butyl bromide into t-butyl alcohol? Explain the process through the mechanism in stepwise manner.

  26. Answer the following.
    (i) Predict the major product formed when HCI is added to iso-butylene,
    (ii) What happens when CH3-Br is treated with KCN?
    (iii) Identify the chiral molecule in the following pair.

    (iv) Arrange the compounds in the order of I reactivity towards SN2 displacement. 2-Bromo-2-methylbutane, I-Bromopentane, 2-Bromo pentane.

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