护理入学考试化学练习卷（附答案）

反应 A + B → AB 表示哪种类型的反应？

1. A燃烧反应
2. B合成（化合）反应
3. C分解反应
4. D置换反应

什么是同位素？

1. A中子数不同的同一元素的原子
2. B得到了电子的离子
3. C质子数不同的同一元素的原子
4. D中子数相同的不同元素的原子

What is a dilute solution?

1. AOne with no solvent at all
2. BOne with a small amount of solute in a lot of solvent
3. COne with a large amount of solute in a little solvent
4. DOne in which the solute has reacted with the solvent

What is the normal boiling point of a liquid?

1. AThe temperature at which its density is greatest
2. BThe temperature at which it first starts to evaporate
3. CThe temperature at which its vapour pressure equals 1 atmosphere
4. DThe temperature at which its particles stop moving

How should the volume of water in a graduated cylinder be read?

1. AFrom above the cylinder, at the top edge of the curved surface
2. BAt eye level, from the bottom of the curved surface (meniscus)
3. CFrom below, at the highest point the water touches the glass
4. DAt any angle, from the middle of the cylinder

What is carbon-14 dating used for?

1. AFinding the exact age of rocks that are billions of years old
2. BEstimating the age of material that was once alive
3. CDetecting carbon monoxide in a room
4. DMeasuring body temperature

A small amount of acid is spilled on a lab bench. Why is a weak base such as sodium bicarbonate preferred over strong NaOH to neutralise it?

1. ASodium bicarbonate is a strong acid that cancels the spill
2. BExcess sodium bicarbonate is far less harmful than excess NaOH
3. CNaOH does not react with acids at room temperature
4. DSodium bicarbonate makes the spilled acid evaporate

Equal masses of sand and water sit in the sun and absorb the same amount of heat. Which warms up more, and why?

1. ASand, because it has a higher specific heat capacity than water
2. BSand, because it has a lower specific heat capacity than water
3. CWater, because it has a higher specific heat capacity than sand
4. DBoth warm equally, because they absorbed the same heat