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NEET Sample Paper NEET Sample Test Paper-4

  • question_answer
    \[250\text{ }ml\] of a sodium carbonate solution contains \[2.65\text{ }g\] of \[C{{O}_{3}}\]. If \[10\text{ }ml\] of this solution is diluted to one litre. What is the concentration of the resultant solution?

    A)  \[0.1\,M\]                    

    B)  \[0.001M\]

    C)  \[0.01\text{ }M\]                    

    D)  \[\text{1}{{\text{0}}^{-4}}\text{ }M\]

    Correct Answer: B

    Solution :

    Molarity of \[N{{a}_{2}}C{{O}_{3}}\] solution \[=\frac{2.65}{106}\times \frac{1000}{250}=0.1M\] \[{{M}_{1}}{{V}_{1}}={{M}_{2}}{{V}_{2}}\] \[10\times 0.1=1000\times {{M}_{2}}\] \[{{M}_{2}}=0.001\,M\]


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