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MHT-CET Adsorption and Colloids — practice questions — page 2

Explore 77 free Adsorption and Colloids questions in MHT-CET Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Adsorption and Colloids questions and exercises with answers

Showing questions 31–60 of 77.

In the Freundlich isotherm, when 1/n equals 1, adsorptionRead the answer and worked solution →Gas masks used in coal mines containRead the answer and worked solution →Which pair are good adsorbents of moisture used for humidity control?Read the answer and worked solution →A high vacuum can be produced by cooling coconut charcoal withRead the answer and worked solution →In the titration of NaCl with AgNO3, which adsorption indicator is used?Read the answer and worked solution →In the froth floatation process, which substance acts as frothing agent for sulfide ores?Read the answer and worked solution →Noble gas mixtures can be separated by selective adsorption onRead the answer and worked solution →Catalysis in which reactants and catalyst are in the same phase is calledRead the answer and worked solution →Nitric oxide acting on SO2 and O2 in the lead chamber process is an example ofRead the answer and worked solution →In the Haber process, iron is a catalyst in which phase relation to the gaseous reactants?Read the answer and worked solution →Finely divided nickel catalyses the hydrogenation of vegetable oil to giveRead the answer and worked solution →A catalytic converter in a car is poisoned by adsorption ofRead the answer and worked solution →Adding 2 percent ethanol to chloroform suppresses formation ofRead the answer and worked solution →In heterogeneous catalysis, the last step in the cycle isRead the answer and worked solution →For a good solid catalyst, adsorption of reactants should beRead the answer and worked solution →The particles of a colloid have diameters in the range of aboutRead the answer and worked solution →Solute particles in a true solution have a diameter of aboutRead the answer and worked solution →In a colloid, the component present in the largest proportion is theRead the answer and worked solution →The colloidal dispersion of a solid in a gas, such as smoke, is a(n)Read the answer and worked solution →Whipped cream is an example of a colloid of typeRead the answer and worked solution →Cheese and butter are colloids of which type?Read the answer and worked solution →Fog and mist are colloids in which a liquid is dispersed inRead the answer and worked solution →Colloids in which particles have great affinity for the dispersion medium areRead the answer and worked solution →Which is a lyophobic colloid?Read the answer and worked solution →Lyophilic sols are called reversible because the solRead the answer and worked solution →Compared with lyophilic sols, lyophobic sols are coagulated byRead the answer and worked solution →Starch, cellulose and proteins are examples of which colloid based on molecular size?Read the answer and worked solution →Soap in water above a certain concentration forms colloidal particles calledRead the answer and worked solution →In a soap micelle in water, the hydrophobic tails pointRead the answer and worked solution →Which method prepares a colloidal gold or platinum sol by striking an arc under the medium?Read the answer and worked solution →

Worked practice questions

In the Freundlich isotherm, when 1/n equals 1, adsorption

  1. is pressure independent
  2. varies directly with pressure
  3. varies as pressure squared
  4. falls to zero abruptly
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Correct answer: B. varies directly with pressure

With 1/n = 1 the equation reduces to x/m = kP, so adsorption is directly proportional to pressure.

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Gas masks used in coal mines contain

  1. activated charcoal
  2. slaked lime powder
  3. dry silver nitrate
  4. pine oil droplets
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Correct answer: A. activated charcoal

Activated charcoal adsorbs poisonous gases before they are inhaled.

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Which pair are good adsorbents of moisture used for humidity control?

  1. Silica and alumina gels
  2. Iron and nickel powders
  3. Platinum and gold foils
  4. Sodium and potassium
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Correct answer: A. Silica and alumina gels

Silica gel and alumina gel adsorb water vapour from air.

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