护理入学考试化学练习卷（附答案）

原子中哪种粒子带正电荷？

1. A电子
2. B质子
3. C中子
4. D光子

In a solution, what is the solvent?

1. AThe gas given off when a solid dissolves
2. BThe substance that is dissolved, usually present in the smaller amount
3. CAny solid that will not dissolve, however long it is stirred
4. DThe substance that does the dissolving, usually present in the larger amount

Where do the mole ratios used in stoichiometry come from?

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

To which family of organic compounds does ethanol, C₂H₅OH, belong?

1. ACarboxylic acids
2. BAlcohols
3. CEsters
4. DAlkanes

Radioactive iodine (iodine-131) is used to treat some thyroid conditions. Why does it reach the thyroid?

1. AIodine-131 is not radioactive inside the body
2. BThe thyroid gland takes up iodine to make its hormones
3. CRadiation is always drawn toward the head
4. DIodine is strongly attracted to the metal ions stored in the neck

Which substance is a non-electrolyte when dissolved in water?

1. APotassium chloride
2. BHydrochloric acid
3. CSodium chloride
4. DGlucose

What is a triglyceride made of?

1. AOne fatty acid joined to three glycerol molecules
2. BThree glucose molecules joined together
3. CThree amino acids joined by peptide bonds
4. DOne glycerol molecule joined to three fatty acids

Which of these is a redox reaction?

1. AZn + CuSO₄ → ZnSO₄ + Cu
2. BCaCO₃ → CaO + CO₂
3. CAgNO₃ + NaCl → AgCl + NaNO₃
4. DNaOH + HCl → NaCl + H₂O