Free PCAT^® Practice Questions

200 mL of an ideal gas is placed in a piston and is held at a pressure of 500 torr. If the temperature is held constant and the pressure is increased to 650 torr, what is the new volume of the gas?

• A. 75 mL
• B. 154 mL
• C. 220 mL
• D. 300 mL

At two independently assorting loci, a man has the following genotype: GgHH. He marries a woman with the genotype ggHh. What is the probability that they will have a child who has the same genotype as the father?

• A. 0
• B. ⅛
• C. ¼
• D. ½

In a certain genetically stable population, the frequency of a recessive allele (for a trait with two alleles) is 0.6. What is the frequency of individuals expressing the dominant trait?

• A. 0.16
• B. 0.24
• C. 0.36
• D. 0.64

Under what conditions do gases exhibit ideal behavior?

• A. Low pressures and low temperatures
• B. Low pressures and high temperatures
• C. High pressures and high temperatures
• D. High pressures and low temperatures

If a multivitamin supplement costs $n for 100 pills, how many pills can be bought for $10?

• A. 10/n
• B. 1000/n
• C. 10n
• D. 1000n

Which of the following is the greatest?

• A. 2⁶
• B. 4⁴
• C. 8³
• D. 16²

Farmer Smith enclosed his rectangular pasture with fence that cost him $1.50 per linear meter. If his pasture is twice as long as it is wide with a total area of 180,000 square meters, then what was the cost, in dollars, of the fence?

• A. 1,200
• B. 1,500
• C. 1,800
• D. 2,700

Paul’s average bowling score for a series was 164 and Dave’s was 158. If each of them bowled 4 games, how much greater was Paul’s total score for the series than Dave’s?

1. 6
2. 12
3. 18
4. 24