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JEE Main & Advanced Chemistry Some Basic Concepts of Chemistry / रसायन की कुछ मूलभूत अवधारणाएँ Question Bank Self Evaluation Test - Some Basic Concepts of Chemistry

  • question_answer
    20 g of \[CaC{{O}_{3}}\]on heating gave 8.8 g of \[C{{O}_{2}}\] and 11.2 g of CaO. This is in accordance with

    A) The law of conservation of mass.

    B) The law of constant composition.

    C) The law of reciprocal proportion.

    D) None of these

    Correct Answer: A

    Solution :

    [a] \[\underset{20g}{\mathop{CaC{{O}_{3}}}}\,\to \underset{8.8g}{\mathop{CaO}}\,+\underset{11.2g}{\mathop{C{{O}_{2}}}}\,\] mass of reactant = mass of products = 20g. Hence the law of conservation of mass is obeyed.


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