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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
    Irrespective of the source, pure sample of water always yields 88.89% mass of oxygen and 11.11% mass of hydrogen. This is explained by the law of

    A) Conservation of mass

    B) Constant composition

    C) Multiple proportions

    D) Constant volume

    Correct Answer: B

    Solution :

    \[{{H}_{2}}O\]contains H an O in a fixed ratio by mass, it illustrates the law of constant compositin.


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