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Surface Chemistry Test - 64

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Surface Chemistry Test - 64
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Sorption is the term used when
    Solution

  • Question 2
    1 / -0
    Which of the following interface can never be obtained?
    Solution

  • Question 3
    1 / -0
    Which one of the following characteristics is not correct for physical adsorption of a gas on solid?
    Solution

  • Question 4
    1 / -0
    Which characteristic of adsorption is wrong?
    Solution

  • Question 5
    1 / -0
    Which one of the following is not the example of homogeneous catalysis?
    Solution
    Hint: A homogenous catalysis is a form of catalysis in which the physical state of reactants and catalysts is similar.
    Correct Answer: Option B
    Explanation of Correct Option:
    • The reaction of formation of $$SO_3$$ in the contact process is as follows:
    $$2SO_2(g)+O_2(g)\ \underrightarrow{_{V_2O_5(s)}} \ 2SO_3$$
    • Here, $$SO_2$$ and $$O_2$$ are in gaseous state and catalyst $$V_2O_5$$ is in solid form.
    • Thus, the formation of $$SO_3$$ in the contact process is not an example of homogenous catalysis.
    Explanation of Incorrect Option:
    • The reaction of formation of $$SO_3$$ in the chamber process is as follows:
    $$2SO_2(g)+O_2(g)\ \underrightarrow{_{NO(g)}} \ 2SO_3$$
    Here, $$SO_2, O_2$$ and catalyst $$NO$$ are present in same physical state i.e., gaseous state.
    Thus, the formation of $$SO_3$$ in the chamber process is an example of homogenous catalysis.
    • The reaction of hydrolysis of an ester in presence of acid is as follows:
    $$CH_3COOC_2H_5(l) + H_2O(l) \ \ \underrightarrow {_{H_2SO_4(l)}} \ \ CH_3COOH + C_2H_5OH$$
    Here, reactants and catalyst all are in the same physical state i.e., liquid.
    Thus, the hydrolysis of an ester in presence of acid is an example of homogenous catalysis.
    • The reaction of decomposition of $$KClO_3$$ in the presence of $$MnO_2$$ is as follows:
    $$2KClO_3(s) \ \ \underrightarrow {_{MnO_2(s)}} \ \ 2KCl + 3O_2$$
    Here, reactants and catalyst all are in the same physical state i.e., solid.
    Thus, decomposition of $$KClO_3$$ in the presence of $$MnO_2$$ is an example of homogenous catalysis.
  • Question 6
    1 / -0
    Physical adsorption is appreciable at
    Solution

  • Question 7
    1 / -0
    TEL minimizes the knocking effect when mixed with petrol. It acts as
    Solution

  • Question 8
    1 / -0
    Platinized asbestos is used as a catalyst in the manufacture of $$H_{2}SO_{4}$$. It is an example of
    Solution

  • Question 9
    1 / -0
    The catalyst used in the manufacture of hydrogen by Bosch's process is
    Solution

  • Question 10
    1 / -0
    Butter is a colloid formed when
    Solution

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