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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
    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) 0.453 g

    C) 4.53 g

    D) 453 g

    Correct Answer: C

    Solution :

    100 g of \[ZnS{{O}_{4}}\] crystals are obtained from = 22.65g Zn 1 g of \[ZnS{{O}_{4}}\]crystals will be obtained from \[=\frac{22.65}{100}g\]  20 g of \[ZnS{{O}_{4}}\]crystals obtained form =\[\frac{22.65}{100}\times 20=4.53g\]


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