Practice Quiz

MCAT Biology - Question List

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221. The pH of four different solutions of common materials is measured. Which of the following lists the solutions in order from most acidic to most basic?
  1. battery acid, lemon juice, blood, laundry detergent
  2. lemon juice, battery acid, blood, laundry detergent
  3. laundry detergent, blood, lemon juice, battery acid
  4. battery acid, blood, laundry detergent, lemon juice
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222. Which of the following statements explains why the bond in hydrogen chloride (HCl) is polar covalent?
  1. The atomic mass of chlorine is greater than that of hydrogen.
  2. The electronegativity of chlorine is greater than that of hydrogen.
  3. The diameter of a chlorine atom is greater than that of a
    hydrogen atom.
  4. The number of valence electrons in a chlorine atom is greater than that in a hydrogen atom.
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223. Which of the following samples of sugar will dissolve fastest in a pitcher of lemonade?
  1. 5 g of cubed sugar in 5°C lemonade
  2. 5 g of cubed sugar in 20°C lemonade
  3. 5 g of granulated sugar in 5°C lemonade
  4. 5 g of granulated sugar in 20°C lemonade
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224. Which of the following comparisons correctly describes subatomic particles?
  1. An electron has a negative charge and a mass larger than the mass of a proton.
  2. A neutron has a negative charge and a mass smaller than the mass of a proton.
  3. A neutron has a neutral charge and a mass larger than the mass of an electron.
  4. A proton has a positive charge and a mass smaller than the mass of an electron.
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225. One way that mixtures differ from pure substances is in the methods that can be used to separate them into their components.Which of the following is a method used to separate the components of some mixtures?
  1. a nuclear reaction
  2. a filtration process
  3. a chemical reaction
  4. an electrolysis process
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