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Surface Chemistry Test - 6

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Surface Chemistry Test - 6
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Weekly Quiz Competition
  • Question 1
    1 / -0.25

    Which gas will be adsorbed on a solid to greater extent.

    Solution

    A gas with high critical temperature has high vander waal force due to which they are more easily liquefiable &hence more easily adsorb as adsorption decreases  their energy

  • Question 2
    1 / -0.25

    Which of the following factors affects the adsorption of a gas on solid ?

    Solution

    Extent of adsorption increase with increase in critical temperature

  • Question 3
    1 / -0.25

    The volume of gases NH3 , CO2  and CH4  adsorbed by one gram of charcoal at 298 K are in

    Solution

    Extent of adsorption &intermoleculer force ∞vander waal const. (a) NH3 >CO2 >CH4

  • Question 4
    1 / -0.25

    The heat of physisorption lie in the range of

    Solution

    Refer theory

  • Question 5
    1 / -0.25

    Which of the following is not a gel ?

    Solution

    Milk is emulsion

  • Question 6
    1 / -0.25

    Which of the following is used to adsorb water

    Solution

    H2 O + SiO2 →SiO2 . xH2 O
    Sillica gel

  • Question 7
    1 / -0.25

    An emulsion is colloidal system of

    Solution

    Emulsion :- (ℓ+ ℓ) dispersed phase &dispersion medium both are liquid

  • Question 8
    1 / -0.25

    Which of the following is a lyophobic colloid ?

    Solution

    Gelation, starch &gum are organic in nature &hence lyophilic in nature but S8 is inorganic in nature &hence lyophobic in nature

  • Question 9
    1 / -0.25

    The nature of bonding forces in adsorption

    Solution

    Vander waal force is responsible for adsorption.

  • Question 10
    1 / -0.25

    The Tyndall effect associated with colloidal particles is due to

    Solution

    Tyndall effect is due to scattering of light

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