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NEET Sample Paper NEET Sample Test Paper-67

  • question_answer
    Two solutions of a substance (non-electrolyte) are mixed in the following manner 480 ml of M first solution + 520 mL of 1.2 M second solution. What is the molarity of the final mixture?

    A) 1.20 M

    B) 1.50 M

    C) 1.344 M                       

    D) 2.70 M

    Correct Answer: C

    Solution :

    \[{{M}_{1}}{{V}_{1}}+{{M}_{2}}{{V}_{2}}={{M}_{3}}{{V}_{3}}\]; \[1.5 \times  480 +1.2 \times  520 =M\,\,\times \,\,1000\] \[M=\frac{720+624}{1000}=1.344\,\,M\]


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