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JEE Main & Advanced Chemistry Some Basic Concepts of Chemistry / रसायन की कुछ मूलभूत अवधारणाएँ Question Bank Atomic Molecular and Equivalent masses

  • question_answer
    1.25 g of a solid dibasic acid is completely neutralised by 25 ml of 0.25 molar \[Ba{{(OH)}_{2}}\]solution. Molecular mass of the acid is

    A)                 100        

    B)                 150

    C)                 120        

    D)                 200

    Correct Answer: D

    Solution :

               Molarity \[=\frac{W(gm)\times 1000}{V(ml)\times \text{molecular weight}}\]                    \[0.25=\frac{1.25\times 1000}{25\times \text{molecular weight}}\]                                 \[\therefore \]   Molecular weight \[=\frac{1.25\times 1000}{0.25\times 25}=200\].


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