NEET Chemistry Some Basic Concepts of Chemistry / रसायन की कुछ मूलभूत अवधारणाएँ NEET PYQ-Some Basic Concepts Chemistry

  • question_answer
    Concentrated aqueous sulphuric acid is 98% \[{{H}_{2}}S{{O}_{4}}\] by mass and has a density of \[1.80\text{ }g\text{ }m{{L}^{-1}}.\] Volume of acid required to make one litre of 0.1 M \[{{H}_{2}}S{{O}_{4}}\] solution is:                                                                                                                                     [AIPMT (S) 2007]

    A)        11.10 mL                    

    B)  16.65 Ml

    C)  22.20 mL

    D)       5.55 mL

    Correct Answer: D

    Solution :

    Normality \[\text{=}\frac{\text{wt  }\!\!%\!\!\text{ }\,\text{ }\!\!\times\!\!\text{  }\,\text{density }\,\text{ }\!\!\times\!\!\text{ 10}}{\text{eq}\text{.wt}\text{.}}\]  
    \[=\frac{98\times 1.8\times 10}{49}=36\,N\]
    \[{{N}_{1}}{{V}_{1}}={{N}_{2}}{{V}_{2}}\]
    \[36\times V=0.2\times 1000\]     
    \[V=\frac{0.2\times 1000}{36}=5.55\,\,mL.\]


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