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

At sea level, at what temperature does pure water freeze?

  1. A100 °C (212 °F)
  2. B0 °C (32 °F)
  3. C−32 °C (−26 °F)
  4. D32 °C (90 °F)
2.Facile

What is an acid–base indicator?

  1. AA gas given off by acids
  2. BA substance that neutralises every acid
  3. CA substance that changes colour depending on pH
  4. DA device that measures temperature
3.Facile

What is a single covalent bond?

  1. AThe attraction between two oppositely charged ions
  2. BTwo pairs of electrons shared between two atoms
  3. COne pair of electrons shared between two atoms
  4. DOne electron transferred from one atom to another
4.Media

A temperatura costante il volume di un gas si dimezza. Che cosa accade alla sua pressione?

  1. ASi dimezza
  2. BRaddoppia
  3. CDiventa quattro volte più piccola
  4. DResta uguale
5.Media

Come influisce di solito l'aumento di temperatura sulla velocità di una reazione?

  1. AFerma completamente la reazione
  2. BAumenta la velocità
  3. CNon ha effetto sulla velocità
  4. DDiminuisce la velocità
6.Media

Drops of water form on the outside of a glass of ice water. Where does this water come from?

  1. AThe ice evaporates through the glass
  2. BThe glass releases water when it gets cold
  3. CWater leaks through tiny holes in the glass
  4. DWater vapour in the air condenses on the cold glass
7.Difficile

A sealed bag of crisps (potato chips) packed at sea level looks puffed up when it is carried to a high mountain. Why?

  1. AMore gas is produced by the crisps at altitude
  2. BThe bag becomes thinner and weaker at altitude
  3. CThe gas inside the bag is heated strongly by the mountain sunlight
  4. DThe outside air pressure is lower, so the gas inside expands
8.Difficile

Half-normal saline (0,45% NaCl) is compared with blood plasma, which has about the same concentration as 0,9% NaCl. How is 0,45% NaCl described, and what happens to red blood cells placed in it?

  1. AHypertonic; water tends to move out of the cells, which shrink
  2. BHypertonic; salt moves into the cells, which then swell
  3. CIsotonic; water moves equally in and out, so the cells keep their shape
  4. DHypotonic; water tends to move into the cells, which swell

Soluzioni

  1. 1. B · 0 °C (32 °F)
  2. 2. C · A substance that changes colour depending on pH
  3. 3. C · One pair of electrons shared between two atoms
  4. 4. B · Raddoppia
  5. 5. B · Aumenta la velocità
  6. 6. D · Water vapour in the air condenses on the cold glass
  7. 7. D · The outside air pressure is lower, so the gas inside expands
  8. 8. D · Hypotonic; water tends to move into the cells, which swell

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