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JEE Main & Advanced Chemistry Some Basic Concepts of Chemistry / रसायन की कुछ मूलभूत अवधारणाएँ Question Bank Critical Thinking

  • question_answer
    Zinc sulphate contains 22.65% of zinc and 43.9% of water of crystallization. If the law of constant proportions is true, then the weight of zinc required to produce 20 g of the crystals will be

    A)                 45.3 g    

    B)                 4.53 g

    C)                 0.453 g  

    D)                 453 g

    Correct Answer: B

    Solution :

               100 g of ZnSO4 crystals are obtained from =22.65g Zn                    1g of ZnSO4 crystals will be obtained from\[=\frac{22.65}{100}g\] Zn                                 20 g of ZnSO4 crystals obtained from \[=\frac{22.65}{100}\times 20=4.53\ g\]


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