Practice Quiz

MCAS Biology Practice - Question List

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251. Four different gases are all observed to have the same temperature. Which of the following conclusions is supported by this observation?
  1. All four gases must have the same mass.
  2. All four gases must have the same pressure.
  3. All four gases must have equal numbers of particles.
  4. All four gases must have equal average kinetic energies.
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252. Atoms of element A and atoms of element B react to form a compound. In the reaction, the radius of each atom of element A is decreased. Which of the following explains this decrease in atomic radius in the reaction?
  1. The atoms of element A lose electrons to atoms of element B.
  2. The atoms of element A gain neutrons from atoms of element B.
  3. Nuclear particles are converted into energy in atoms of element A.
  4. Protons become more densely packed in the nuclei of element A atoms.
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253. Which of the following correctly describes a trend from top to bottom in the group 2 (2A) elements on the periodic table?
  1. Ionic radius decreases.
  2. Ionic charge increases.
  3. Atomic radius increases.
  4. Atomic number decreases.
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254. Which of the following occurs when a rigid container of gas is heated?
  1. The pressure inside the container increases.
  2. The pressure inside the container decreases.
  3. The pressure inside the container stays the same.
  4. The pressure inside the container changes the composition of the gas.
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255. Which of the following is the same for both hydrogen and potassium?
  1. atomic mass
  2. total mass of neutrons
  3. number of valence electrons
  4. number of filled energy levels
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