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

Which unit is commonly used for the density of a liquid?

1. Ag·mL
2. BmL/g
3. Cg/mL
4. Dkg

Come si chiama una colonna verticale della tavola periodica?

1. AUn guscio
2. BUn periodo
3. CUn gruppo
4. DUna serie

What is the name of the polyatomic ion NH₄⁺?

1. AAmmonia
2. BAmmonium
3. CNitrate
4. DNitride

Quando un gas viene riscaldato in un contenitore rigido e sigillato, che cosa accade alla sua pressione?

1. AAumenta
2. BDiminuisce
3. CResta uguale
4. DScende a zero

How should the volume of water in a graduated cylinder be read?

1. AAt eye level, from the bottom of the curved surface (meniscus)
2. BFrom above the cylinder, at the top edge of the curved surface
3. CAt any angle, from the middle of the cylinder
4. DFrom below, at the highest point the water touches the glass

A radioactive isotope has a half-life of 5 days. A sample starts with 80 g. How much is left after 10 days?

1. A10 g
2. B0 g
3. C40 g
4. D20 g

How much water must be added to 50 mL of a 10% solution to make a 2% solution?

1. A100 mL
2. B250 mL
3. C200 mL
4. D40 mL

Frying an egg turns the clear egg white solid and white. What happens to the proteins?

1. AThey are hydrolysed, so the peptide bonds break into separate amino acids
2. BThey are burned to carbon dioxide and water
3. CThey are converted into fats
4. DThey are denatured: their shape changes, but the peptide bonds stay intact