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JEE Main & Advanced Chemistry Some Basic Concepts of Chemistry / रसायन की कुछ मूलभूत अवधारणाएँ Question Bank Mock Test - Some Basic Concepts of Chemistry

  • question_answer
    29.2 % (w/w) HCl stock solution has density of 1.25 g \[m{{L}^{-1}}\]. The molecular weight of HCl is 36.5 g \[mo{{l}^{-1}}\]. The volume (mL) of stock solution required to prepare a 200 mL solution of 0.4 M HCl is

    A) 6

    B) 5

    C) 3

    D) 8

    Correct Answer: D

    Solution :

    stock solution of HCl =29.2%(w/w) Molarity of stock solution of HCl = \[\frac{29.2\times 1000\times 1.25}{36.5\times 100}\] If volume of stock solution required = V ml \[V\times \frac{29.2}{36.5}\times \frac{1000}{80}=200\times 0.4\Rightarrow V=8ml\]


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