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NEET Chemistry Haloalkanes and Haloarenes / हैलोएल्केन तथा हैलोएरीन्स Question Bank Self Evaluation Test - Haloalkanes and Haloarenes

  • question_answer
    Although hexafluoroethane \[({{C}_{2}}{{F}_{6}},b.p.-79{}^\circ C)\] and ethane \[({{C}_{2}}{{H}_{6}},b.p.-89{}^\circ C)\] differ very much in their molecular weights, their boiling points differ only by\[10{}^\circ C\]. This is due to  

    A) lowpolarizability of F              

    B) nearly similar size of F and H

    C) both [a] and [b]         

    D) Neither of the two

    Correct Answer: C

    Solution :

    [c] Small difference in boiling points of \[{{C}_{2}}{{F}_{6}}\] and  \[{{C}_{2}}{{F}_{6}}\] is due to the fact that (i) the F atom is slightly larger than H, and (ii) F has lowpolarizability


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