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

What is the melting point of a substance?

1. AThe temperature at which it catches fire
2. BThe temperature at which its liquid turns into a gas
3. CThe temperature at which its solid turns into a liquid
4. DThe temperature at which it dissolves in water

How many millilitres are in 1 litre?

1. A10,000
2. B100
3. C10
4. D1000

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

1. APressure and volume
2. BVolume and temperature
3. CPressure and temperature
4. DMass and volume

Sulfur has 16 electrons. In which period of the periodic table is it?

1. APeriod 3
2. BPeriod 6
3. CPeriod 16
4. DPeriod 2

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

1. A0 g
2. B10 g
3. C20 g
4. D40 g

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

1. ADiventa quattro volte più piccola
2. BSi dimezza
3. CRaddoppia
4. DResta uguale

What is a triglyceride made of?

1. AThree amino acids joined by peptide bonds
2. BThree glucose molecules joined together
3. COne fatty acid joined to three glycerol molecules
4. DOne glycerol molecule joined to three fatty acids

Why is gamma radiation used to sterilise sealed medical supplies such as syringes?

1. AIt passes through the packaging and kills microbes without making the items radioactive
2. BIt adds a protective chemical coating to the items
3. CIt is stopped by the packaging, so it only cleans the outside
4. DIt heats the items to very high temperatures, so the microbes are burned away inside the pack