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NEET Chemistry Some Basic Concepts of Chemistry / रसायन की कुछ मूलभूत अवधारणाएँ NEET PYQ-Some Basic Concepts Chemistry

  • question_answer
    Mole fraction of the solute in a 1.00 molal aqueous solution is                                              [AIPMT (S) 2011]

    A)  0.0177         

    B)       0.0344

    C)  1.7700            

    D)       0.1770

    Correct Answer: A

    Solution :

    1.00 molal aqueous solution = 1.0 mole in
    1000 g water \[{{n}_{solute}}=\,1\,;\,\,{{W}_{solvent}}=1000\,\,g\]
    \[{{n}_{solvent}}=\frac{1000}{18}=55.56\]
    \[{{X}_{solute}}=\frac{1}{1+55.56}=0.0.177\]


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