护理入学考试化学练习卷（附答案）

酸和碱相互中和时产生什么？

1. A更强的酸
2. B金属和氢气
3. C盐和水
4. D只有二氧化碳

According to the kinetic molecular theory, how do gas particles move?

1. AAlways in a single direction, set by the pull of gravity
2. BOnly when heated, and then in neat lines between the walls
3. CConstantly, randomly and in straight lines between collisions
4. DSlowly in fixed positions

A food Calorie (written with a capital C) equals which amount of energy?

1. A1 kilojoule (1000 J)
2. B1 kilocalorie
3. C1 joule
4. D1 calorie

Why does stirring help a solid dissolve faster?

1. AIt brings fresh solvent into contact with the solid's surface
2. BIt raises the temperature of the solvent by friction a great deal
3. CIt turns the solid into a liquid
4. DIt increases the amount of solute that can dissolve in total

温度升高通常如何影响固体在水中的溶解量？

1. A溶解的固体更少
2. B固体变成气体
3. C溶解的固体更多
4. D对固体没有影响

Nitrogen is in group 15 of the periodic table. How many valence electrons does a nitrogen atom have?

1. A15
2. B7
3. C5
4. D3

How much water must be added to 50 mL of a 10% solution to make a 2% solution?

1. A100 mL
2. B250 mL
3. C200 mL
4. D40 mL

Which approach best reduces a health worker's exposure to ionising radiation?

1. AWork faster without any shielding
2. BLimit the time near the source, increase the distance and use shielding
3. CStand closer to the source so the job is finished sooner and exposure is shorter
4. DRely only on wearing gloves