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NEET Sample Paper NEET Sample Test Paper-74

  • question_answer
    Molality of aqueous solution of 8.0 M ethanol having density 1.025 g/mL is

    A)  12.17              

    B)  24.34                 

    C)  10.17              

    D)  14.35

    Correct Answer: A

    Solution :

    Mass of 1 L solution of ethanol = 1025 g Mass of solute in \[1.0 L = 8 \times  46 = 368 g\] Mass of solvent \[= 1025 - 368 g = 657 g\] Molality (m) \[= \,\frac{8}{657} \times  1000 \,= 12.17\]


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