护理入学考试化学练习卷（附答案）

Which group contains the alkaline earth metals, such as magnesium and calcium?

1. AGroup 2
2. BGroup 17
3. CGroup 1
4. DGroup 18

Where do the mole ratios used in stoichiometry come from?

1. AThe molar masses of the reactants
2. BThe physical states of the substances
3. CThe subscripts in each formula
4. DThe coefficients of the balanced equation

What are the units of molarity?

1. AMoles of solute per kilogram of the solvent used
2. BGrams of solute per litre of solution (g/L)
3. CMoles of solute per litre of solution (mol/L)
4. DGrams of solute per 100 g of solution

How many grams are in 2.5 kg?

1. A0.0025 g
2. B25 g
3. C250 g
4. D2500 g

A patient's arterial blood pH is 7.25. How is this described?

1. AAcidosis
2. BNormal
3. CNeutral
4. DAlkalosis

According to the Brønsted–Lowry definition, what is an acid?

1. AAn electron pair donor
2. BA proton (H⁺) acceptor
3. CA hydroxide ion donor
4. DA proton (H⁺) donor

Why is Dmitri Mendeleev's early periodic table regarded as such a success?

1. AHe proved that the atoms of every element contain electrons
2. BHe discovered the noble gases and placed them in group 18
3. CHe left gaps and correctly predicted the properties of elements not yet discovered
4. DHe arranged the elements by atomic number, which he had discovered

Haemoglobin binds oxygen reversibly: Hb + O₂ ⇌ HbO₂. How does this equilibrium help deliver oxygen to tissues?

1. AThe equilibrium does not change anywhere in the body
2. BLow O₂ in tissues shifts it to the right, releasing oxygen
3. CLow O₂ in tissues shifts it to the left, releasing oxygen
4. DHigh O₂ in tissues shifts it to the left, absorbing oxygen