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 a beta particle?

  1. AA neutron that leaves the nucleus
  2. BA wave of visible light
  3. CA helium nucleus with two protons and two neutrons
  4. DA high-energy electron released from a nucleus
2.Facile

What is an empirical formula?

  1. AThe simplest whole-number ratio of atoms in a compound
  2. BThe actual number of each atom in one molecule
  3. CA drawing of how the atoms are bonded
  4. DThe mass of one mole of a compound
3.Facile

What kind of carbon–carbon bonds do alkanes contain?

  1. AIonic bonds
  2. BOnly single bonds
  3. CAt least one triple bond
  4. DAt least one double bond
4.Media

Why does keeping food in a refrigerator slow down spoilage?

  1. ALower temperatures raise the activation energy of every reaction
  2. BCold temperatures add preservatives to the food
  3. CLower temperatures slow down chemical and microbial reactions
  4. DCold air contains no oxygen
5.Media

Why does stirring help a solid dissolve faster?

  1. AIt increases the amount of solute that can dissolve in total
  2. BIt turns the solid into a liquid
  3. CIt brings fresh solvent into contact with the solid's surface
  4. DIt raises the temperature of the solvent by friction a great deal
6.Media

Quale affermazione sugli elementi dello stesso gruppo è corretta?

  1. AHanno lo stesso numero di gusci elettronici ma proprietà diverse
  2. BSono sempre tutti gas a temperatura ambiente
  3. CHanno la stessa massa atomica e lo stesso numero di protoni
  4. DHanno lo stesso numero di elettroni di valenza e proprietà chimiche simili
7.Difficile

A carboxylic acid reacts with an alcohol in the presence of an acid catalyst. What are the products?

  1. AAn ester and water
  2. BAn alkane and oxygen
  3. CAn amino acid and carbon dioxide
  4. DA salt and hydrogen
8.Difficile

A student tests whether water temperature affects how fast sugar dissolves. Which set of factors should be kept the same in every trial?

  1. ANothing, because changing several factors at once gives more useful data
  2. BThe water temperature and the dissolving time
  3. COnly the colour of the cup
  4. DThe mass of sugar, the type of sugar, the volume of water and the amount of stirring

Soluzioni

  1. 1. D · A high-energy electron released from a nucleus
  2. 2. A · The simplest whole-number ratio of atoms in a compound
  3. 3. B · Only single bonds
  4. 4. C · Lower temperatures slow down chemical and microbial reactions
  5. 5. C · It brings fresh solvent into contact with the solid's surface
  6. 6. D · Hanno lo stesso numero di elettroni di valenza e proprietà chimiche simili
  7. 7. A · An ester and water
  8. 8. D · The mass of sugar, the type of sugar, the volume of water and the amount of stirring

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