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In the experiement to verify the law of ...

In the experiement to verify the law of conservation of mass, weighing of the

A

reactants is only required

B

products is only required

C

reactants and the products is a must

D

contents are not essential

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A student was asked by his teacher to verify the law of conservation of mass in the laboratory. He prepared 5 % aqueous solutions of NaCl and Na_(2)SO_(4) . He mixied 10 mL of both these solutions in a conical flask. He weighed the flask on a balance. He then stirred the flask with a rod and weighed it after sometime. There was no change in mass. Read this narration and answer the following question (i) Was the student able to verify the law of conservation of mass ? (ii) If not, what was the mixtake committed by him ? (iii) In your opinion, what he should have done ? (iv) What is the value associated with it ?

Define the law of conservation of energy .

Knowledge Check

  • According to law of conservation of mass

    A
    The mass of product remains constant
    B
    The total mass remains constant
    C
    The mass of products remains constant
    D
    All of the above

  • The law of conservation of mass was given by :

    A
    Dalton
    B
    Proust
    C
    Lavoisier
    D
    Berzelius

  • The law of conservation of mass is not obeyed by a

    A
    redox reaction
    B
    double decomposition reaction
    C
    nuclear reaction
    D
    neutralization reaction

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