护理入学考试化学练习卷（附答案）

Which of these is a chemical property?

1. ADensity
2. BColour
3. CBoiling point
4. DFlammability

What does the double arrow (⇌) in a chemical equation show?

1. AThe reaction needs a catalyst
2. BThe reaction releases heat
3. CThe reaction is very fast
4. DThe reaction is reversible

What is the chemical formula of carbon dioxide?

1. AC₂O
2. BCO₃
3. CCO
4. DCO₂

In the ideal gas law, PV = nRT, what does n stand for?

1. AThe number of moles of gas
2. BThe number of molecules of gas
3. CThe number of atoms per molecule
4. DThe density of the gas

Why does oxygen move from the alveoli of the lungs into the blood?

1. AThe partial pressure of oxygen is higher in the blood than in the alveoli
2. BOxygen is pumped actively into the blood
3. COxygen is heavier than carbon dioxide
4. DThe partial pressure of oxygen is higher in the alveoli than in the blood

How much heat is needed to raise the temperature of 100 g of water by 10 °C (specific heat of water = 4.18 J/g·°C)?

1. A41,800 J
2. B418 J
3. C4180 J
4. D41.8 J

How many millilitres of 0.2 M NaOH are needed to neutralise 25 mL of 0.1 M HCl?

1. A50 mL
2. B5 mL
3. C12.5 mL
4. D25 mL

Samples of hydrogen gas (H₂) and oxygen gas (O₂) are at the same temperature. Which statement is correct?

1. AH₂ molecules have more kinetic energy and move faster
2. BO₂ molecules move faster because they are heavier
3. CThey have the same average kinetic energy, but H₂ molecules move faster
4. DBoth move at the same average speed