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प्रश्न
Physical adsorption of a gaseous species may change to chemical adsorption with ______.
विकल्प
decrease in temperature
increase in temperature
increase in surface area of adsorbent
decrease in surface area of adsorbent
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उत्तर
Physical adsorption of a gaseous species may change to chemical adsorption with increase in temperature.
Explanation:
On increasing temperature physisorption changes to chemisorption. As the temperature increases, energy of activation of adsorbate particles increases which leads to formation of chemical bond between adsorbate and adsorbent. Hence, physisorption transform into chemisorption.
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संबंधित प्रश्न
Write the differences between physisorption and chemisorption with respect to the following:
(i) Specificity
(ii) Temperature dependence
(iii) Reversibility and
(iv) Enthalpy change
Differentiate between adsorbtion and absorption.
Give reason why a finely divided substance is more effective as an adsorbent.
Discuss the effect of temperature on the adsorption of gases on solids.
How does chemisorption vary with temperature?
How does chemisorption vary with temperature?
Answer in one sentence:
Name type of adsorption in which the compound is formed.
Powdered substances are more effective adsorbents than their crystalline forms because ____________.
In physisorption, adsorption is generally ____________.
Which of the following is not a favourable condition for physical adsorption?
In physisorption adsorbent does not show specificity for any particular gas because ______.
In which of the following reactions heterogenous catalysis is involved?
(a) \[\ce{2SO2 (g) + O2 (g) ->[NO(g)] 2SO3 (g)}\]
(b) \[\ce{2SO2 (g) ->[Pt(s)] 2SO3 (g)}\]
(c) \[\ce{N2 (g) + 3H2 (g) ->[Fe(s)] 2NH3 (g)}\]
(d) \[\ce{CH3COOCH3 (l) + H2O (l) ->[HCI(l)] CH3COOH (aq) + CH3OH (aq)}\]
Why is it important to have clean surface in surface studies?
What is the role of activated charcoal in gas mask used in coal mines?
Which among the following is a false statement?
A plot of 10 g (x/m) versus 10 g p for the adsorption of a gas on the surface of a solid gives a straight line with slope equal to:-
Adsorption play no role in:-
Assertion A : Activated charcoal adsorbs SO2 more efficiently than CH4.
Reason R : Gases with lower critical temperatures are readily adsorbed by activated charcoal.
In light of the above statements, choose the correct answer from the options given below.
Which of the following statements is incorrect regarding physisorptions?
