JEE Main & Advanced Chemistry Surface & Nuclear Chemistry / भूतल और नाभिकीय रसायन Question Bank

done Numerical Value Type Questions - Surface Chemistry Total Questions - 15

• question_answer1)
  How many of the following are colloid? Sodium chloride, Starch solution, Cane sugar and Blood
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• question_answer2)
  How many of the following substances gives a positive charged sol? Gold, a metal sulphide, ferric hydroxide and silver chloride
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• question_answer3)
  How many of the following are not a colloid? Chlorophyll, Smoke, Ruby glass and Milk
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• question_answer4)
  For the coagulation of 500 mL of arsenious sulphide sol, 2 mL of 1 M NaCl is required. What is the flocculation value of NaCl?
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• question_answer5)
  The gold number of gelatin is 0.01. What the amount of gelatin to be added to 1000 mL of a colloidal sol of gold to prevent its coagulation, before adding 1 mL of 10% NaCl solution.
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• question_answer6)
  526.3 mL of 0.5 m HCl is shaken with 0.5 g of activated charcoal and filtered. The concentration of the filtrate is reduced to 0.4 m. Calculate the amount of adsorption (x/m).
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• question_answer7)
  How many colloidal systems exist in nature in which liquid is dispersed phase?
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• question_answer8)
  For soaps critical micelle concentration (CMC) is \[{{10}^{x}}\,(min)\] to \[{{10}^{-y}}(max.)\] mol/L. What is the value of x?
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• question_answer9)
  Graph between log \[\left( \frac{x}{m} \right)\] and log P is a straight line at angle \[45{}^\circ \] with intercept OA as shown. Calculate \[\left( \frac{x}{m} \right)\] at a pressure of 2 atm. (Given: k= 2)
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• question_answer10)
  On addition of 1 mL of 10% NaCl solution to 10 mL gold sol in the presence of 0.025 g of starch, the coagulation is just prevented. Find the gold number of starch.
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• question_answer11)
  3.6 gram of oxygen is adsorbed on 1.2 g of metal powder. What volume of oxygen adsorbed per gram of the adsorbent at 1 aim and 273 K?
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• question_answer12)
  100 mL of 0.6 M acetic acid is shaken with 2 g activated carbon. The final concentration of the solution after adsorption is 0.5 M. What is the amount of acetic acid adsorbed per gram of carbon?
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• question_answer13)
  Find the order of the reaction in which a gas is formed at the surface of tungsten due to adsorption.
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• question_answer14)
  1 gm of charcoal adsorbs 100 mL 0.7 M \[C{{H}_{3}}COOH\] to form a monolayer, and thereby the molarity of \[C{{H}_{3}}COOH\]reduces to 0.59. Calculate the surface area of the charcoal adsorbed by each molecule of acetic acid in terms of \[{{10}^{-\,19}}\]. Surface area of charcoal \[=3.01\times {{10}^{2}}\,{{m}^{2}}/gm.\]
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• question_answer15)
  20% of surface sites are occupied by \[{{N}_{2}}\]molecules. The density of surface site is \[6.023\times {{10}^{14}}\text{ }c{{m}^{-\,2}}\] and total surface area is\[1000\text{ }c{{m}^{2}}\]. The catalyst is heated to 300 K while N is completely desorbed into a pressure of 0.001 atm and volume of\[2.46\text{ }c{{m}^{3}}\]. Find the number of active sites occupied by each \[{{N}_{2}}\] molecule.
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