NEET Sample Paper NEET Sample Test Paper-32

  • question_answer The volume of water which must be added to a mixture of \[350\text{ }c{{m}^{3}}\]of \[6M\text{ }HCl\]and \[650\text{ }mL\]of \[3M\text{ }HCl\]to get a resulting solution of 3M concentration is

    A)  \[75\text{ }mL.\]           

    B)  \[150\text{ }mL.\]

    C)  \[100\text{ }mL.\]          

    D)  \[350\text{ }mL.\]

    Correct Answer: D

    Solution :

    \[{{N}_{3}}{{V}_{3}}={{N}_{1}}{{V}_{1}}+{{N}_{2}}{{V}_{2}}\] \[3\times {{V}_{3}}=6\times 350+3\times 650\] \[{{V}_{3}}=700+650=1350\] volume of added water \[=1350-(350+650)\] \[=350\,mL\]

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