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Surface Chemistry -Important Questions & Preparation Tips

Sep 17, 2013 17:35 IST

    CBSE Class 12th Chapter, Surface Chemistry obtains 05 Marks. Experts of Jagranjosh.com offer the best practice material that covers all important questions so that students will not miss any portion while preparing for board exams or competitive exams. Consider the mentioned terms/questions at the time of studying.
     
    •Distinguish between adsorption and absorption with an example?
    •Explain the mechanism for the attainment of equilibrium on adsorption?
    •Can physisorption and chemisorptions occur simultaneously? Explain.
    •How can charcoal be used as adsorbent?
    •The characteristics and differences of physisorption and chemisorptions.
    •How can one verify the validity of Freundlich Isotherm?
    •Explain the mechanism of Heterogeneous catalysis? Is it sufficient to explain the catalyst mechanism?
    •What happens when a poisonous gas is introduced in Haber’s process?
    •Why the ester hydrolysis is slow in the beginning and becomes faster after sometime?
    •What is the difference between sols, gels and emulsions?
    •Explain the cleansing action of soap?
    •Explain the mechanism of micelle formation?

    •Explain the process of Tyndall effect and Brownian motion?
    •How is a lyophilic sol different from lyophobic sols?
    •Define-
    a) Helmholtz electrical double layer
    b) Zeta potential
    c) Electro osmosis
    d) Hardy-Schulze Rule with application
    e) Kraft temperature
    •Define the dispersed and dispersion medium with example?
    •How are the emulsions of oil in water stabilized?
    •Explain the process of emulsification?
    •Explain the mechanism of clotting of blood?
    •Why the sky look blue to us in a normal sunny day?
    •Give Reasons-
    a)How is the river delta formed?
    b)Occurrence of rain if electrified sand is thrown opposite to the clouds from an aero plane.
    c)What happens when sewage water is allowed to flow through a tunnel with metallic electrodes?
    •Describe the mechanism of adsorption from solution?
    •Analyze the observations of adsorption from solution phase?

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    •During adsorption, there is always a decrease in the heat of adsorption. Why it happens? Explain the mechanism of adsorption.
    •What is the characteristics difference between physical & chemical adsorption?
    •What is adsorption isotherm?


    •Describe Freundich adsorption isotherm?
                
    •What are the factors which control adsorption from gases & solutions on solids
    •What are the applications of adsorption
    •How catalyst helps in adsorption reactions
    •What are homogeneous & heterogeneous catalysis
    •What is shape selective catalysis? How it is carried out?

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    •Examples of homogeneous & heterogeneous catalysis
    •Characteristics of enzyme catalysis.
    •Give some examples of enzyme catalysis.
    •Mechanism of enzyme catalysis

    •What are colloids? On what criteria they are classified?
    •Describe preparation and purification of colloids
    •When a beam of light is passed through a colloidal sol, tyndall effect is observed. Explain some properties of colloids
    •What is electrophoresis?

    •How coagulation of lyophobic sols can be carried out?
    •Classify emulsions and describe their preparation and properties;
    •What are micelles?
    •Explain the action of soap

    •What is demulsification
    •Do you know why sky looks blue? It’s because of scattering of blue light by the dust particles along with water suspended in the air. Give some more examples of colloids from daily life.
    •List the application of colloids.

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