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MaxLei 30 perguntas

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Perguntas do quiz (30)

  1. 160. Choose pairs of aqueous solutions of weak electrolytes:
    1. ACoCl₂, Na₂So₃
    2. BNiCl₂, NH₄OH
    3. CNa₂CO₃ , H₂CO₃
    4. DHCOOH, HNO₂
  2. 261. Weak electrolytes
    1. Ahave value of ionization constant α=1
    2. Bthey differ from strong electrolytes by dissociation constants
    3. Cthey are present in solutions only in the form of ions
    4. Dthey have the same values of pK as strong electrolytes
  3. 362. There are given 3 water solutions: A(NiCl2), c=0.1mol.l⁻¹; B (KCl), c=0.15mol.l⁻¹; C (sucrose), c=0.3mol.l⁻¹; Mark which of statements is correct:
    1. Athe greatest osmotic pressure is in solution C
    2. Bin solution A is the lowest osmotic pressure
    3. Cin all solutions is equal osmotic pressure
    4. Dsolution B has greater osmotic pressure than solution A
  4. 463. There is solution of NaCl (c=0.15 mol.l⁻¹). Mark which of solutions are isotonic to the solution of NaCl:
    1. ACuSo₄, c=0.1 mol.l⁻¹
    2. Bfructose, c=0.3mol.l⁻¹
    3. CNiCl₂, c=0.15 mol.l⁻¹
    4. DCdSO₄, c=0.15 mol.l⁻¹
  5. 564. There is solution of Ba(NO₃)₂ with concentration 0.2 mol.l⁻¹. Mark which of solutions are hypertonic to the solution " ":
    1. AAgNO₃, c=0.5mol.l⁻¹
    2. BFeSO⁴, c= 300 mmol.l⁻¹
    3. CFe₂(SO₄)₃, c=0.15mol.l⁻¹
    4. DNiCl, c=300 mmol.l⁻¹
  6. 665. Saline is an aqueous solution of NaCl (Mr = 58) with concentration 0.15 mol.l⁻¹. This solution contains:
    1. A30 mmol of NaCl in 200 ml of solution
    2. B0.15 mol of NaCl in one litre of H₂O
    3. C17.4g of NaCl in 2 l of solution
    4. D4.35g of NaCl in 500ml of H₂O
  7. 766. Osmosis
    1. Ais the process which can not proceed in the human organism
    2. Bis characteristic for the system formed by solvent, solution and semi permeable membrane between them
    3. Chappens when two solutions of NaCl with different concentrations are seperated by semi permeable mebrane
    4. Dis free movement of particles of dissolved compound from the place of higher concentration to the place of lower concentration
  8. 867. Oxidation:
    1. Ais every chemical reaction during which either atoms or ions of elements accept electrons
    2. Bis every chemical reaction during which either atoms or ions of elements lose electrons
    3. Cis the process during which positiv oxidation number of atoms decreases
    4. Dis the process during which positiv oxidation number of atoms increases
  9. 968. Reduction:
    1. Ais every chemical reaction during which either atoms or ions of elements accept electrons
    2. Bis every chemical reaction during which either atoms or ions of elements lose electrons
    3. Cis the process during which positive oxidation number of atoms decreases
    4. Dis the process during which positive oxidation number of atoms increases
  10. 1069. Reducing agents are compounds which:
    1. Aare donators of electrons in chemical reaction
    2. Bare acceptors of electrons in chemical reaction
    3. Care donors of protons in chemical reaction
    4. Dare donors of hydrogen atoms during hydrogenation of the other compounds

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Quiz sobre Sem título, criado por MaxLei em 11-06-2015.
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MaxLei
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