护理入学考试化学练习卷（附答案）

At sea level, at what temperature does pure water freeze?

1. A0 °C (32 °F)
2. B−32 °C (−26 °F)
3. C100 °C (212 °F)
4. D32 °C (90 °F)

How many millilitres are in 1 litre?

1. A100
2. B1000
3. C10
4. D10,000

What is an unsaturated solution?

1. AA solution with undissolved solid at the bottom
2. BA solution that holds the maximum possible solute
3. CA solution that can still dissolve more solute
4. DA solution with no solute at all

A piece of metal has a density of 8 g/cm³ and a volume of 5 cm³. What is its mass?

1. A13 g
2. B0.625 g
3. C1.6 g
4. D40 g

In a reaction at equilibrium, a product is continuously removed. What happens?

1. AThe reaction rate drops to zero
2. BThe equilibrium shifts to the left to form more reactants
3. CMore product keeps forming as the equilibrium shifts to the right
4. DThe reactants run out immediately

哪种元素的电负性最大？

1. A氟
2. B铁
3. C氦
4. D钠

Many ethene (C₂H₄) molecules join together to form poly(ethene), a plastic. What type of reaction is this?

1. ACombustion, in which ethene reacts with oxygen
2. BAddition polymerisation, in which the C=C double bonds open up to link the monomers
3. CCondensation polymerisation, in which a water molecule is released at each new link
4. DHydrolysis, in which water breaks each monomer apart

Na⁺, Mg²⁺, F⁻ and O²⁻ all have 10 electrons. Which ion is the largest?

1. AMg²⁺
2. BO²⁻
3. CNa⁺
4. DF⁻