CBSE  /  Class 11  /  Chemistry  /  Equilibrium

  • 1. 
    The solubility of Ca

  • 6y²
  • 36 y
  • 64 y
  • 108 y

  • 2. 
    A physician wishes to prepare a buffer solution at pH = 3. 85 that efficiently resists changes in pH yet contains only small concentration of the buffering agents. Which of the following weak acids together with its sodium salt would be best to use?

  • 2, 5-Dihydroxy benzoic acid (pK
  • Acetoacetic acid (pK
  • m-Chlorobenzoic acid (pK
  • p-Chlorocinnamic acid (pK

  • 3. 
    Which of the following aqueous solutions will have highest pH?

  • NaCl
  • CH
  • Na
  • NH

  • 4. 
    What is the pH of a 0. 10 M solution of barium hydroxide, Ba (OH)

  • 11. 31
  • 11. 7
  • 13. 30
  • None of these

  • 5. 
    Which of the following oxides is not expected to react with sodium hydroxide?

  • CaO
  • SiO
  • BeO
  • B

  • 6. 
    The pH of a 10M NaOH solution is nearest to

  • 10
  • 7
  • 4
  • -10

  • 7. 
    It forms a salt NaX on reaction with alkali. The degree of hydrolysis of 0. 1 M solution of NaX is

  • 0. 0001%
  • 0. 01%
  • 0. 1%
  • 0. 15%

  • 8. 
    When equal volumes of 0. 1 M NaOH and 0. 01 M HCl are mixed, the hydroxide ion concentration is

  • 7. 0
  • 1. 04
  • 12. 65
  • 2. 0

  • 9. 
    Solubility product of Ag

  • 2. 66 × 10
  • 4. 5 × 10
  • 5. 3 × 10
  • 2. 42 × 10

  • 10. 
    In a reversible chemical reaction at equilibrium, if the concentration of any one of the reactants is doubled, then the equilibrium constant will

  • Also be Doubled
  • Be Halved
  • Remain the Same
  • Become One-Fourth
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