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प्रश्न
Answer in one sentence:
Name type of adsorption in which vander Waals focres are present.
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उत्तर
Physical adsorption or physisorption.
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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
Give reasons for the following observations:
Physisorption decreases with increase in temperature.
What is the effect of temperature on chemisorption ?
Why is adsorption always exothermic?
Write any two characteristics of chemisorption.
Why are powdered substances more effective adsorbents than their crystalline forms?
What are the factors which influence the adsorption of a gas on a solid?
Write one similarity between Physisorption and Chemisorption
How does chemisorption vary with temperature?
How does chemisorption vary with temperature?
Which of the following compounds is formed when tungsten adsorbs oxygen gas?
Which of the following is an example of physisorption?
Which of the following is true about chemisorption?
Which among the following is a property of physisorption?
Chromatography is based on the principle of ____________.
The extent of adsorption increases with the ____________.
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?
Why is chemisorption referred to as activated adsorption?
What is the role of activated charcoal in gas mask used in coal mines?
Give an example where physisorption changes to chemisorption with rise in temperature. Explain the reason for change.
In physical adsorption, gas molecules are bound on the solid surface by
Write three differences between physisorption and chemisorption.
