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question_answer1) What is desorption?
question_answer2) What is sorption?
question_answer3) What happens toandduring adsorption of gas on solid?
question_answer4) What are physical and chemical adsorption?
question_answer5) What is adsorption isotherm?
question_answer6) Write equation for Freundlich adsorption isotherm.
question_answer7) Under what condition Freundlich adsorption isotherm fails?
question_answer8) What is the use of adsorption in metallurgy?
question_answer9) What is the principle of separation of inert gases from its mixture?
question_answer10) Which catalysis involves adsorption?
question_answer11) Why silica and alumina gels are used for removing moisture and controlling humidity?
question_answer12) Which substance is used in gas mask?
question_answer13) How is a high vacuum produced?
question_answer14) How does adsorption of a gas on a solid surface vary with temperature?
question_answer15) Give two uses of adsorption.
question_answer16) What is physisorption?
question_answer17) Adsorption is exothermic. Why?
question_answer18) What is a catalyst?
question_answer19) Define promoters and poisons with example.
question_answer20) What do you mean by selectivity of catalyst?
question_answer21) Define activity of catalyst.
question_answer22) What are zealots?
question_answer23) Give name of a substance used as shape selective catalyst.
question_answer24) Which catalyst is used to convert alcohols into gasoline in petroleum industry?
question_answer25) What are enzymes?
question_answer26) What is biochemical catalysis?
question_answer27) Which enzyme is used in inversion of cane sugar?
question_answer28) Name the enzyme used in the conversion of glucose into ethyl alcohol.
question_answer29) What is the role of pepsin and trypsin in the stomach?
question_answer30) Name the catalyst which converts milk into curd.
question_answer31) Write the use of the following enzymes (i) Maltase (ii) Urease (iii) Diastase
question_answer32) Which catalyst is used in Haber's process for the manufacture of ammonia?
question_answer33) Name the catalyst used in Ostwald's process for the manufacture of nitric acid.
question_answer34) In which process is used as catalyst?
question_answer35) What is the optimum condition for the maximum efficiency of a enzyme catalyst?
question_answer36) What are activators? Give example.
question_answer37) What are co-enzymes? Give example.
question_answer38) What are enzyme inhibitors and poisons?
question_answer39) What are colloids?
question_answer40) What is the diameter of colloidal particles?
question_answer41) What is Kraft temperature?
question_answer42) Explain critical micelle concentration.
question_answer43) Give one example of peptising agent.
question_answer44) Name the method used for purification of colloidal solution.
question_answer45) The value of colligative properties of colloids are very small. Why ?
question_answer46) Which property of colloid was used to set up a microscope ?
question_answer47) On which property colour of colloids depends?
question_answer48) On what factors Brownian movement of a colloids depends?
question_answer49) How Brownian movement is responsible for stability of colloids?
question_answer50) Define Zeta potential.
question_answer51) What is Helmholtz electrical double layer?
question_answer52) Define coagulating value.
question_answer53) Why lyophilic sols are more stable than lyophobic sols?
question_answer54) What are protective colloids? Which type of colloids are used as protective colloids?
question_answer55) What are emulsions?
question_answer56) What are various type of emulsions?
question_answer57) Give one example each of oil in water and water in oil type emulsions.
question_answer58) What is emulsifying agent? Give one example.
question_answer59) Why does sky look blue?
question_answer60) Give reason for the formation of delta.
question_answer61) How is natural rubber obtained?
question_answer62) What is the use of emulsion in photography?
question_answer63) What is tanning?
question_answer64) Colloidal medicines are more effective. Why ?
question_answer65) Why bleeding stops by using alum or ferric chloride?
question_answer66) What happens when alum is added to natural water?
question_answer67) When does rainfall occur?
question_answer68) What is difference between a 'sol' and a 'gel'?
question_answer69) What is adsorption?
question_answer70) Define adsorbate and adsorbent. Give examples.
question_answer71) What is absorption? How is absorption different from adsorption?
question_answer72) What are the points of difference between physisorption and chemisorption?
question_answer73) On what factors adsorption of a solute from a solution varies?
question_answer74) Define Catalysis.
question_answer75) What is homogeneous catalysis?
question_answer76) What is heterogeneous catalysis?
question_answer77) What is the mechanism of heterogeneous catalysis?
question_answer78) What is adsorption theory of heterogeneous catalysis?
question_answer79) What is intermediate compound formation theory of catalysis?
question_answer80) What is shape selective catalysis?
question_answer81) What is the mechanism of enzyme catalysis?
question_answer82) How are colloids classified on the basis of physical state of dispersed phase and dispersion medium?
question_answer83) What are lyophilic and lyophobic colloids? Give one example of each type.
question_answer84) What are micelles? Give one example of a micelle system.
question_answer85) What is peptization?
question_answer86) What is dialysis? Mention its use.
question_answer87) Explain ultra filtration.
question_answer88) What is Tyndall effect?
question_answer89) What are the two conditions necessary for Tyndall effect?
question_answer90) What do you mean by Brownian movement?
question_answer91) What is the cause of Brownian movement?
question_answer92) What is the reason for origin of charge on colloidal particles?
question_answer93) Explain electrophoresis.
question_answer94) What is electro-osmosis?
question_answer95) Define coagulation.
question_answer96) State Hardy Schuize rule.
question_answer97) Write three important differences between lyophilic a lyophobic colloids.
question_answer98) Explain with example (i) Multimolecular colloids (ii) Macromolecular colloids and (iii) Associated colloids.
question_answer99) How are colloids prepared ?
question_answer100) Pressure of a closed vessel filled with gas decreases when powdered charcoal is added.
question_answer101) Explain the cause of adsorption.
question_answer102) Why is necessary to purify the colloidal solution?
question_answer103) When solution is added to solution a negatively charged colloidal sol is formed but when solution is added to solution positively charged sol results, Explain.
question_answer104) Physical and chemical adsorption respond differently to the rise in temperature. Explain.
question_answer105) Identify the dispersed phase and dispersion medium in the following colloidal solutions : smoke (ii) fog (iii) cheese (iv) milk (v) whipped cream.
question_answer106) When \[{{H}_{2}}S\] gas is passed through an aqueous solution of \[S{{O}_{2}}\] gas, a yellow turbidity is formed. Why?
question_answer107) A reddish brown colloidal sol is formed when a small amount of \[FeC{{l}_{3}}\] is added to freshly precipitated \[Fe{{(OH)}_{3}}\]. Explain.
question_answer108) What is the basic difference between dialysis and osmosis?
question_answer109) 2.56 g of sulphur present in 100 mL of solution in colloidal form shows an osmotic pressure of 2.463 atm at 300 K. How many atoms of sulphur get associated to form the colloidal sol?
question_answer110) Why do colloidal solutions differ in colours?
question_answer111) The sol formed on adding silver nitrate solution to excess of potassium iodide solution is negatively charged while the same prepared in the reverse manner has positive charge. Explain.
question_answer112) There is a decrease in the extent of adsorption after sometime while absorption proceeds at a uniform rate. Explain.
question_answer113) The gases which are liquefied more easily have a greater tendency to get adsorbed on the surface of the adsorbent than the gases which are liquefied with difficulty. Assign reason.
question_answer114) Critical temperature of \[{{N}_{2}},\,CO\] and \[C{{H}_{4}}\] are 126, 134 and 190 K respectively. Arrange them in increasing order of adsorption on the surface of activated charcoal.
question_answer115) Gelatin is generally added to ice cream. Why?
question_answer116) The addition of ferric hydroxide sol to arseneous sulphide sol results in the precipitation of both. Explain.
question_answer117) Lyophilic sols are called reversible colloids. Assign reason.
question_answer118) Artificial rain can be caused by spraying charged dust particles over clouds. Discuss.
question_answer119) Ferric hydroxide sol is more readily coagulated by Na3P04 in comparison to \[KCl\]. Why?
question_answer120) Delta is generally formed where river meets the ocean. How will you account for it?
question_answer121) The layer of fat in the pans used for manufacturing soaps can be removed by adding boiling washing soda solution. How will you account for it?
question_answer122) Which out of the following solutions having the same concentration will be most effective in causing the coagulation of the arsenic sulphide sol that is yellow in colour: \[KCl,\,MgC{{l}_{2}},\,AlC{{l}_{3}}\] or \[N{{a}_{3}}P{{O}_{4}}\]?
question_answer123) 100 mL of a standard sol requires 240 mg of starch for its protection against coagulation. Calculate gold number of starch.
question_answer124) Adsorption is always exothermic in nature ; Do you agree?
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