Scheda di esercizi di Chimica per i test di ammissione a infermieristica con soluzioni

Scheda di esercizi di Chimica per i test di ammissione a infermieristica gratuita e stampabile: 8 esercizi dal livello facile a quello d’esame, con le soluzioni. Stampala o salvala come PDF.

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Nome: ____________________   Data: ____________

1.Facile

What is an electrolyte?

  1. AA substance that forms ions and conducts electricity when dissolved in water
  2. BA gas that dissolves in blood
  3. CA substance that dissolves as whole molecules without forming any ions
  4. DA metal that conducts electricity as a solid
2.Facile

A cleaning solution has a pH of 12. How is it described?

  1. ANeutral
  2. BStrongly acidic
  3. CWeakly acidic
  4. DStrongly basic
3.Facile

Charles's law describes the relationship between which two properties of a gas, at constant pressure?

  1. ADensity and mass
  2. BPressure and number of moles
  3. CPressure and volume
  4. DVolume and temperature
4.Media

Nitrogen is in group 15 of the periodic table. How many valence electrons does a nitrogen atom have?

  1. A3
  2. B15
  3. C5
  4. D7
5.Media

Which is larger, a sodium atom (Na) or a sodium ion (Na⁺)?

  1. AIt depends on the temperature
  2. BThe sodium ion
  3. CThe sodium atom
  4. DThey are the same size
6.Media

Which coefficients balance __Na + __Cl₂ → __NaCl?

  1. A2, 1, 2
  2. B1, 2, 1
  3. C1, 1, 1
  4. D2, 2, 1
7.Difficile

A liquid has a density of 1,2 g/mL. What is the mass of 250 mL of this liquid?

  1. A300 g
  2. B208 g
  3. C251,2 g
  4. D30 g
8.Difficile

Which statement correctly distinguishes a scientific law from a scientific theory?

  1. AA law describes what happens; a theory explains why it happens
  2. BA law is only a guess, while a theory is a proven fact
  3. CA theory becomes a law once it is proved
  4. DLaws apply only to chemistry, theories only to biology

Soluzioni

  1. 1. A · A substance that forms ions and conducts electricity when dissolved in water
  2. 2. D · Strongly basic
  3. 3. D · Volume and temperature
  4. 4. C · 5
  5. 5. C · The sodium atom
  6. 6. A · 2, 1, 2
  7. 7. A · 300 g
  8. 8. A · A law describes what happens; a theory explains why it happens

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