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Haryana PMT Haryana PMT Solved Paper-2011

  • question_answer
    \[0.2mole\]of \[HCl\] and \[0.1\text{ }mole\]of \[CaC{{l}_{2}}\] were dissolved in water to make \[500mL\]of solution. The molarity of \[C{{l}^{-}}\] ions in the solution is

    A)   \[0.04\text{ }M\]          

    B)  \[0.8M\]

    C)  \[0.4M\]                            

    D)  \[0.08M\]

    Correct Answer: B

    Solution :

                    \[0.2\,mol\,HCl=0.2\,mol\,C{{l}^{-}}ion\] \[0.1mol\,CaC{{l}_{2}}=0.2\,mol\,C{{l}^{-}}ion\] Total \[C{{l}^{-}}\] ion \[=0.4\text{ }mol\] Hence, molarity of \[C{{l}^{-}}\] ion \[=\frac{0.4}{500}\times 1000\]\[=0.8M\]


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