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Why is it important to have clean surfac...

Why is it important to have clean surface in surface studies ?

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It is important to have a clean surface so that they are not covered by the gases of the air `(O_(2), N_(2)` etc.)and surface is available for adsorption of desired gases.
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Knowledge Check

  • Why is it important to have iodised salt in our diet?

    A
    It improves eye sight
    B
    It helps in smooth functioning of the thyroid gland
    C
    It helps in building bones
    D
    It helps in gaining height

  • The adsorption of vapours on a clean surface is a spontaneous process because

    A
    change in the entropy of the process is highly positive
    B
    enthalpy change is highly positive
    C
    change in entropy is zero
    D
    change in enthalpy is highly negative

  • The surface of srystals can be studied using

    A
    diffraction of visible light
    B
    diffraction of x-rays
    C
    interference of sound waves
    D
    refraction of radio waves

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    Gases do not have free surfaces. Explain.

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