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Haloalkanes & Haloarenes Test - 3

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Haloalkanes & Haloarenes Test - 3
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  • Question 1
    1 / -0.25

    Which one of the following is likely to give a precipitate with AgNO3  solution?

    Solution

    Tert-butyl chloride forms most stable 3 °carbocation. So will give white precipitate of AgCl with AgNO3  solution immediately.

    Hence, option (B) is the answer.

  • Question 2
    1 / -0.25

    A solution of (–)-1-chloro-1-phenylethane in toluene racemises slowly in the presence of a small amount of SbCl5 , due to the formation of

     

    Solution

    During racemisation, carbocation intermediate is formed.

    Hence option (A) is the answer.

  • Question 3
    1 / -0.25

    In SN 2 reactions, the correct order of reactivity for the following compounds: CH3 Cl, CH3 CH2 Cl, (CH3 )2 CHCl and (CH3 )3 CCl is

    Solution

    Reactivity in SN 2 is inversely proportional to steric hindrance.

    Hence the correct order of reactivity is CH3 Cl >CH3 CH2 Cl >(CH3 )2 CHCl >(CH3 )3 CCl

    Hence, Option (c) is the answer.

  • Question 4
    1 / -0.25

    Elimination of bromine from 2-bromobutane results in the formation of

    Solution

    2-bromobutane →  CH3 CH = CHCH3  + CH3 CH2 CH=CH2

    The major product follows Saytzeff rule.

    Hence option (A) is the correct answer.

  • Question 5
    1 / -0.25

    Which of the following is a tertiary halogenoalkanes?

    Solution

    √Br CH3 -( CH )- CH2 - CH2 - CH3 √CH3 The carbon with which the Br is bonded is bonded with another 3 carbon atoms. So haloalkane is 3.

  • Question 6
    1 / -0.25

     Which of the following is not true about optical isomers?

    Solution

    Superimposable (mirror images of each other) substances are achiral because chiral substances cannot have its own mirror image. And achiral substances do not show optical activity nor any optical isomers. Hence, answer is B.

  • Question 7
    1 / -0.25

     Which of the following is not an aryl halide?

    Solution

     Because it is Open chain compound /Aliphatic Compound and not aryl halide as it does not contain halogen atom. It 's simply  alkane.

  • Question 8
    1 / -0.25

    Pick up the correct statement about alkyl halides.

    Solution

    In general organic compounds are soluble in organic solvents. Hence alkyl halides are soluble in organic solvents.

  • Question 9
    1 / -0.25

     Which one of the following is 1-bromo-3-methyl butane?

    Solution

    It is  1-bromo-3-methylbutane.

  • Question 10
    1 / -0.25

    C5 H11 Br is least soluble in:

    Solution

    C5 H11 Br are only very slightly soluble in water. They are more soluble in organic solvents.

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