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The degree of hardness of water is usual...

The degree of hardness of water is usually expressed in terms of

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Knowledge Check

  • Zero hardness of water is achieved by

    A
    using lime soda process
    B
    excess lime treatment
    C
    ion exchange method
    D
    using excess alum dosage

  • The hardness of water is measured by

    A
    EDTA method
    B
    Distillation method
    C
    Conductivity method
    D
    All of these

  • Masses of stars and galaxies are usually expressed in terms of :

    A
    neutron mass
    B
    earth 's mass
    C
    solar mass
    D
    lunar mass

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