Description : In case of physical adsorption, the difference between heat of adsorption and heat of normal condensation is (A) Equal to the heat of formation of surface compound (B) Equal to the heat of wetting (C) Zero (D) Called integral heat of adsorption
Last Answer : (B) Equal to the heat of wetting
Description : Name type of adsorption in which van der Waals forces are present.
Last Answer : Name type of adsorption in which van der Waals forces are present.
Description : With increase in the concentration of the adsorbate, the integral heat of adsorption (A) Increases (B) Decreases (C) Remains unchanged (D) May increase or decrease; depends on the type of adsorbate
Last Answer : (B) Decreases
Description : Assertion :- The graphical representation of physical adsorption with temp is Reason :- This is weak adsorption & adsorption is exothermic process.
Last Answer : Assertion :- The graphical representation of physical adsorption with temp is Reason :- This is weak ... D. If both Assertion & Reason are False.
Description : In frenudlich adsorption isotherm, the value of `1//n` is
Last Answer : In frenudlich adsorption isotherm, the value of `1//n` is A. 1 in case of physical adsorption B. 1 in ... in all case D. between 2 and 4 in all cases
Description : If `x` is the amount of adsorbate and `m` is the amount of adsorbent, which of the following relation is related to adsorption process?
Last Answer : If `x` is the amount of adsorbate and `m` is the amount of adsorbent, which of the following relation is related to ... (x/m) D. `(x)/(m)= p xx T`
Description : The Langmuir adsorption isotherm is deduced using the assumption.
Last Answer : The Langmuir adsorption isotherm is deduced using the assumption. A. The adsorption isotherm is ... D. The adsorption takes place in multilayers.
Description : Assertion(A): Physical adsorption of molecules on the surface requires activation energy. Reason(R): Because the bonds of adsorbed molecules are broke
Last Answer : Assertion(A): Physical adsorption of molecules on the surface requires activation energy. Reason(R): ... D. If both Assertion & Reason are False.
Description : Assertion :- A sol of `As_(2)S_(3)` prepared by the action of `H_(2)S` on `As_(2)O_(3)` is negatively charge. Reason :- Due to adsorption of `S^(-2)`
Last Answer : Assertion :- A sol of `As_(2)S_(3)` prepared by the action of `H_(2)S` on `As_(2)O_(3) ... Reason is False. D. If both Assertion & Reason are False.
Description : According to Freundlich adsorption isotherm, which of the following is correct ?
Last Answer : According to Freundlich adsorption isotherm, which of the following is correct ? A. `(x)/(m ... the above are correct for different ranges of pressure
Description : The ease of adsorption of the hydrated alkali metal ions on ion-exchange resins follows the order:
Last Answer : The ease of adsorption of the hydrated alkali metal ions on ion-exchange resins follows the order: A. `K^(+)lt Na + ... (+)lt K^(+)lt Na^(+)lt Li^(+)`
Description : Frendlich adsorption isotherms are properly represented as in
Last Answer : Frendlich adsorption isotherms are properly represented as in A. B. C. D.
Description : An adsorption isotherm equation proposed by Langmuir is of the form `V = (V_(0)bPO)/((1 + bP))` where V is the volume of gas adsorbed at pressure P. F
Last Answer : An adsorption isotherm equation proposed by Langmuir is of the form `V = (V_(0)bPO)/((1 + bP))` where V is ... of V on P can be depicted as B. C. D.
Description : 100 mL of 0.3 M acetic acid is shaken with 0.8 g wood charcoal. The final concentration of acetic acid in the solution after adsorption is 0.125 M. Th
Last Answer : 100 mL of 0.3 M acetic acid is shaken with 0.8 g wood charcoal. The final concentration of acetic acid in the ... g` C. `1.31 g` D. `0.131 g`
Description : Adsorption of a gas follows Freundlich adsorption isotherm. In the given plot, x is the mass of the gas adsorbed on mass m of the adsorbent at pressur
Last Answer : Adsorption of a gas follows Freundlich adsorption isotherm. In the given plot, x is the mass of the gas adsorbed on mass m ... p^(1//2)` D. `p^(1//4)`
Description : Which one of the following is not a property of physical adsorption ?
Last Answer : Which one of the following is not a property of physical adsorption ? A. Higher the ... , more the adsorption D. Unilayer adsorption occurs
Description : Two compounds I and II are eluted by column chromatography (adsorption of `I gt II`). Which one of the following is a correct statement ?
Last Answer : Two compounds I and II are eluted by column chromatography (adsorption of `I gt II`). Which one of the ... slower and has higher `R_(f)` value than I
Description : Adsorption of a gas on a surface follows Freundlich adsorption isotherm. Plot of `"log " (x)/(m)` versus log P gives a straight line with slope equal
Last Answer : Adsorption of a gas on a surface follows Freundlich adsorption isotherm. Plot of `"log " (x ... of pressure. D. Adsorption is independent of pressure.
Description : A particular adsorption process has the following characteristics : (i) It arises due to vander Waals forces and (ii) it is reversible. Identify the c
Last Answer : A particular adsorption process has the following characteristics : (i) It arises due to vander Waals ... temperature. D. Energy of activation is low.
Description : The following statement relate to the adsorption of gases on a solid surface. Identify the incorrect statement among them :
Last Answer : The following statement relate to the adsorption of gases on a solid surface. Identify the ... are increased D. Entropy of adsorption is negative
Description : For a linear plot of log(x/m) versus log p in a Freundlich adsorption isotherm, which of the following statements is correct ? (k and n are constants)
Last Answer : For a linear plot of log(x/m) versus log p in a Freundlich adsorption isotherm, which of the following ... Both k and 1/n appear in the slope term.
Description : According to Freundlich adsorption isotherm, which of the following is correct?
Last Answer : According to Freundlich adsorption isotherm, which of the following is correct? A. `(x)/(m) ... the above are correct for different ranges of pressure
Description : Which one of the following characteristics is not correct for physical adsorption ?
Last Answer : Which one of the following characteristics is not correct for physical adsorption ? A. ... enthalpy and entropy of adsorption are negative.
Description : The correct statement(s) pertiaining to the adsorption of a gas on a solid surface is (are)
Last Answer : The correct statement(s) pertiaining to the adsorption of a gas on a solid surface is (are) A. ... it is very slow due to higher energy of activation.
Description : Which of the following statements regarding adsorption is/are correct?
Last Answer : Which of the following statements regarding adsorption is/are correct? A. Extent of adsorption ... adsorption is dependent on the nature of adsorbent
Description : Which of the following statements about physical adsorption is correct ?
Last Answer : Which of the following statements about physical adsorption is correct ? A. It is always ... enthalpy of adsorption as compared to chemisorption.
Description : Identify the appropriate graph between enthalpy and progress of physical adsorption.
Last Answer : Identify the appropriate graph between enthalpy and progress of physical adsorption. A. B. C. D.
Description : There is desorption of physical adsorption when
Last Answer : There is desorption of physical adsorption when A. temperature is increased B. temperature is ... pressure is increased D. concentration is increased
Description : Adsorption is the phenomenon in which a substance :
Last Answer : Adsorption is the phenomenon in which a substance : A. accumulates on the surface of the other ... close to the other substance D. None of these
Description : Following is the variation of physical adsorption with temperature.
Last Answer : Following is the variation of physical adsorption with temperature. A. B. C. D.
Description : What is adsorption?
Last Answer : What is adsorption?
Description : Adsorption and absorption. Give one example.
Last Answer : Distinguish between the following : Adsorption and absorption. Give one example.
Description : Explain two applications of adsorption.
Last Answer : Explain two applications of adsorption.
Description : Explain how the adsorption of gas on solid varies with : a. nature of adsorbate and adsorbent
Last Answer : Explain how the adsorption of gas on solid varies with : a. nature of adsorbate and adsorbent b. surface area of adsorbent
Description : Adsorption is surface phenomenon. Explain.
Last Answer : Adsorption is surface phenomenon. Explain.
Description : Freundlich adsorption isotherm, with the help of a graph.
Last Answer : Explain the following : Freundlich adsorption isotherm, with the help of a graph.
Description : Give four uses of adsorption.
Last Answer : Give four uses of adsorption.
Description : Mention factors affecting adsorption of gas on solids.
Last Answer : Mention factors affecting adsorption of gas on solids.
Description : Define adsorption. Why students can read blackboard written by chalks?
Last Answer : Define adsorption. Why students can read blackboard written by chalks?
Description : Write an equation for Freundlich adsorption isotherm.
Last Answer : Write an equation for Freundlich adsorption isotherm.
Description : What is the adsorption Isotherm?
Last Answer : What is the adsorption Isotherm?
Description : Write characteristics of adsorption.
Last Answer : Write characteristics of adsorption.
Description : What is adsorption in chromatography?
Last Answer : Adsorption chromatography (AC) is chromatographic separation due to energetic interactions between the solute and the surface of the porous packings.
Description : Frequently employed materials for the adsorption chromatography of proteins include (A) High capacity supporting gel (B) Starch blocks (C) Calcium phosphate gel alumina gel and hydroxy apatite (D) All of these
Last Answer : Answer : C
Description : The sorting out of molecules according to size and shape may be adapted to protein purification in this technique: (A) Adsorption chromatography (B) Gel filtration chromatography (C) Paper chromatography (D) None of these
Last Answer : Answer : B
Description : When water is held tightly as thin film around soil particles by adsorption forces and flows at gravity of > -31 bar, is called
Last Answer : Ans.Hygroscopic water
Description : Rainbow is due to (a) Adsorption of sunlight in minute water droplets (b) Diffusion of sunlight through water droplets (c) Ionisation of water droplets (d) Refraction and reflection of sunlight by water droplets
Last Answer : Ans:(d)
Description : Muddy water is treated with alum in purification process, it is termed as : (1) emulsification (2) absorption (3) adsorption (4) coagulation
Last Answer : (4) coagulation Explanation: Natural and wastewater contain small particulates that are suspended in water forming a colloid. These particles carry the same charges, and repulsion prevents them from combining into larger particulates to settle.
Description : Activated Charcoal is used to remove colouring matter from pure substances by – (1) Bleaching (2) Oxidation (3) Adsorption (4) Reduction
Last Answer : (3) Adsorption Explanation: Heating wood to a very high temperature in the absence of air makes charcoal. When it is heated to an even higher temperature, about 930°C, impurities are driven from its ... . It does so by the process of adsorption, or by attracting these molecules to the surface.