护理入学考试化学练习卷（附答案）

What range does the common pH scale cover?

1. A−7 to +7
2. B0 to 100
3. C1 to 10
4. D0 to 14

一个原子有 6 个质子、6 个中子和 6 个电子。它的质量数是多少？

1. A0
2. B6
3. C18
4. D12

How many millilitres are in 1 litre?

1. A100
2. B10
3. C1000
4. D10,000

Glucose has the molecular formula C₆H₁₂O₆. What is its empirical formula?

1. ACHO
2. BCH₂O
3. CC₂H₄O₂
4. DC₆H₁₂O₆

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

1. AOxygen is pumped actively into the blood
2. BThe partial pressure of oxygen is higher in the alveoli than in the blood
3. CThe partial pressure of oxygen is higher in the blood than in the alveoli
4. DOxygen is heavier than carbon dioxide

What is the molar mass of calcium carbonate, CaCO₃ (Ca = 40, C = 12, O = 16 g/mol)?

1. A116 g/mol
2. B84 g/mol
3. C100 g/mol
4. D68 g/mol

Marble chips react with hydrochloric acid, giving off CO₂. The gas is produced quickly at first, then more and more slowly. Why does the rate fall?

1. AThe CO₂ produced turns back into acid
2. BThe activation energy steadily increases as the reaction goes on
3. CThe acid concentration falls as it is used up, so collisions become less frequent
4. DThe products act as a catalyst that slows the reaction down

Why does a burn from steam at 100 °C usually cause more damage than one from liquid water at 100 °C?

1. ASteam releases a large amount of extra energy as it condenses on the skin
2. BSteam particles are hotter than water particles at the same reading
3. CSteam carries dissolved acid that damages the skin
4. DLiquid water cannot pass any of its heat to the skin