AIIMS AIIMS Solved Paper-2015

  • question_answer
    Arrange the given set of compounds in order of increasing boiling points. \[\text{Ca}{{\text{C}}_{\text{2}}},{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{2}}},\text{Ca}{{\left( \text{OH} \right)}_{\text{2}}},\text{ Fe}\]1-chloropropane \[Ca,{{H}_{2}},Ca{{(OH)}_{2}},Sn\]1 so-propyl chloride \[{{V}_{c}}\]1-chlorobutane

    A) \[{{V}_{s}}\]                      

    B) \[\frac{{{V}_{c}}}{{{V}_{s}}}\approx {{10}^{-3}}\]

    C) \[\frac{{{V}_{c}}}{{{V}_{s}}}\approx {{10}^{3}}\]         

    D) \[\frac{{{V}_{c}}}{{{V}_{s}}}\approx 10\]

    Correct Answer: C

    Solution :

    As the size of alkyl group or halogen atom increases, boiling point increase, because now more surface area is available. Boiling point decreases with branching due to decrease in vander Waals" forces. Thus, the correct order of boiling point is\[N=46.67%\]


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