护理入学考试化学练习卷（附答案）

与原子中的其他粒子相比，哪种粒子的质量几乎可以忽略？

1. A中子
2. B整个原子核
3. C质子
4. D电子

What does the rule "like dissolves like" mean?

1. ASolids dissolve only in other solids
2. BEvery substance dissolves in water
3. CPolar solvents dissolve polar substances, and nonpolar solvents dissolve nonpolar ones
4. DOnly substances with identical formulas can ever dissolve in each other

配平的化学方程式表明什么？

1. A产物比反应物多
2. B箭头两边反应前后的分子数相同
3. C两边每种原子的数目相同
4. D只有反应的反应物

温度恒定时，气体的体积减半。其压强会怎样？

1. A不变
2. B变为原来的四分之一
3. C减半
4. D加倍

For the gas reaction N₂ + 3H₂ ⇌ 2NH₃, what is the effect of increasing the pressure?

1. AThe equilibrium shifts to the left, toward N₂ and H₂
2. BThere is no effect on the equilibrium
3. CThe equilibrium shifts to the right, toward NH₃
4. DThe NH₃ breaks down completely

When mercury(II) oxide is heated, it reacts as 2HgO → 2Hg + O₂. What type of reaction is this?

1. ACombustion
2. BSingle replacement
3. CDecomposition
4. DSynthesis

2090 J of heat is added to 50 g of water (specific heat 4.18 J/g·°C). By how much does its temperature rise?

1. A20 °C
2. B5 °C
3. C10 °C
4. D41.8 °C

A compound is a gas at room temperature, does not conduct electricity in any state, and is made of two nonmetals. What kind of substance is it most likely?

1. AA giant covalent network solid
2. BA simple molecular (covalent) substance
3. CA metal with delocalised electrons
4. DAn ionic compound (a lattice of ions)