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

Standard atmospheric pressure (1 atm) is equal to how many millimetres of mercury?

1. A120 mmHg
2. B1000 mmHg
3. C760 mmHg
4. D100 mmHg

Which method separates sand from water?

1. AEvaporation of the sand
2. BDistillation
3. CChromatography
4. DFiltration

What is an element?

1. AA physical mixture of different substances
2. BA particle with an electric charge
3. CA substance made of only one kind of atom
4. DA substance of two or more elements chemically bonded together

Which gas forms when hydrochloric acid reacts with calcium carbonate?

1. AOxygen
2. BChlorine
3. CHydrogen
4. DCarbon dioxide

A red blood cell is placed in pure water (a hypotonic solution). What happens?

1. AWater enters the cell, which swells and may burst
2. BSalt enters the cell, which shrinks
3. CWater leaves the cell, which shrinks and wrinkles
4. DNothing happens to the cell

When a nucleus emits a beta particle, how do its mass number and atomic number change?

1. ABoth fall by 1
2. BMass number rises by 1 and atomic number stays the same
3. CMass number falls by 4 and atomic number falls by 2
4. DMass number stays the same and atomic number rises by 1

When water boils, what is overcome?

1. AThe ionic bonds between H⁺ and O²⁻
2. BThe forces holding the oxygen nucleus together
3. CThe covalent O–H bonds inside each molecule
4. DHydrogen bonds between water molecules

A scuba diver breathes compressed air deep underwater. Why must the diver breathe out while swimming up to the surface?

1. AThe water gets warmer near the surface
2. BOxygen turns to liquid at the surface
3. CThe air in the lungs expands as the outside pressure falls
4. DThe air in the lungs shrinks as the outside pressure falls