护理入学考试化学练习卷（附答案）

What causes the pressure of a gas in a container?

1. AGas particles sticking to the walls
2. BThe weight of the container pressing on the gas inside
3. CGas particles stopping and pushing outward
4. DGas particles colliding with the container walls

Which method separates two liquids with different boiling points, such as alcohol and water?

1. ADistillation
2. BFiltration
3. CSieving
4. DUsing a magnet

Which positive ion is found in the highest concentration inside most body cells?

1. APotassium (K⁺)
2. BMagnesium (Mg²⁺)
3. CSodium (Na⁺)
4. DCalcium (Ca²⁺)

Which statement describes a saturated fat?

1. AIts fatty acid chains have many carbon–carbon double bonds
2. BIt contains no carbon atoms
3. CIt is always liquid at room temperature
4. DIts fatty acid chains have no carbon–carbon double bonds

What are London dispersion forces?

1. AForces that hold protons together in the nucleus
2. BWeak, temporary attractions caused by shifting electrons in molecules
3. CStrong bonds formed by transferring electrons
4. DAttractions between a hydrogen atom and a metal ion

缓冲溶液有什么作用？

1. A加入少量酸或碱时抵抗 pH 的变化
2. B加快中和反应，使 pH 迅速达到恰好 7
3. C使溶液的温度保持恒定
4. D把任何酸变成强碱

Hyperbaric oxygen therapy places a patient in a chamber with oxygen at higher than normal pressure. Why does this raise the oxygen dissolved in blood plasma?

1. AGas solubility in a liquid increases with the partial pressure of the gas
2. BHigher pressure turns the oxygen into a liquid
3. CHigher pressure makes red blood cells divide faster
4. DHigher pressure lowers body temperature, so the blood can hold much more gas

一个葡萄糖分子 C₆H₁₂O₆ 中有多少个原子？

1. A72
2. B18
3. C3
4. D24