ACT PREP Semester Exam

• 4

• 9

• 12

• 14

• 17

Assume that water undergoes a phase change to a gas. Which of the following statements would be true?

• The attractive intermolecular forces of the escaping molecules are weak.

• The average kinetic energy of the water remains the same.

• The rate of movement of the gas molecules decreases.

• The gas will undergo no further phase changes.

Suppose a third sample of water is heated to a higher temperature than Sample 2. It is then found that a greater number of molecules escaped the liquid in Sample 3 than in Sample 2. Would these results be consistent with the results depicted in Figure 1?

• Yes, an increase in temperature leads to a decrease in the number of escaping molecules in the liquid.

• Yes, as the temperature increases, it leads to more molecules escaping the liquid.

• No, the temperature reading of Sample 2 would be five times as high as that of the third sample.

• No, the average kinetic energy of the water will decrease.

• A and C

• D and E

• A and B

• D and B

• C and B

• -7

• 0

• 10

• 14

• 28

• 2√10

• 3√5

• 4√5

• 3√10

• 6√4

• 5

  12

• 12

  13

• 17

  12

• 12

  5

• 3

• -11

  12

• • -1

    • 2

• -2

  7

• 1

  2

• 9

  12

Which of the following generalizations about tadpoles is supported by the results of the study?

• They will not undergo metamorphosis if the are not given thyroxine.

• Metamorphosis in a normal tadpole takes at least five days.

• The most rapid disappearance of the tail is associated with the immersion of tadpoles in the most dilute thyroxine solution.

• Temperature plays a major role in metamorphosis.

After four days, the tadpoles are checked for development. In all samples other than the control, which of the following concentrations of thyroxine would the tadpoles be likely to show the LEAST development?

• 0.5 µg/ml

• 0.2 µg/ml

• 0.1 µg/ml

• All of the tadpoles would show the same dvevelopment.