护理入学考试化学练习卷（附答案）

Which element makes up the largest share of the human body by mass?

1. AHydrogen
2. BOxygen
3. CNitrogen
4. DCarbon

According to the Arrhenius definition, what does a base produce in water?

1. AHydrogen ions (H⁺)
2. BHydroxide ions (OH⁻)
3. CChloride ions (Cl⁻)
4. DCarbonate ions (CO₃²⁻)

为什么水常被称为万能溶剂？

1. A它比其他常见液体能溶解更多的物质
2. B它的分子中任何地方都没有部分电荷，所以能与一切混合
3. C它能完全溶解所有物质
4. D它是地球上唯一的液体

What is the molar mass of sulfuric acid, H₂SO₄ (H = 1, S = 32, O = 16 g/mol)?

1. A98 g/mol
2. B49 g/mol
3. C96 g/mol
4. D50 g/mol

甲烷等烃完全燃烧的产物是什么？

1. A碳和氢气
2. B氧气和水
3. C二氧化碳和水
4. D一氧化碳和氢气

On an energy diagram, the products are at a lower energy than the reactants. What kind of reaction is shown?

1. ANuclear
2. BEndothermic
3. CExothermic
4. DReversible only

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

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

Why does a sodium ion (Na⁺) have almost the same mass as a sodium atom?

1. AThe ion gains a neutron that balances the loss
2. BIons and atoms always have exactly the same mass
3. CThe only difference is one electron, which has a tiny mass
4. DThe ion has one fewer proton, which has a tiny mass