Question 1: Biotechnology has allowed us to genetically modify corn with a gene that acts as a pesticide. What could be a possible environmental impact of this development?

• Insects resistant to the specific pesticide would develop over time.
• The surplus of corn would rot and decay releasing additional greenhouse gases.
• The price of corn would drop dramatically because of a greater supply with no increase in demand.
• Countries able to buy the new corn seeds would see increases in their economy and pollution would rise.

Question 2: What would happen if CH4 was removed from the following reaction that has reached equilibrium

CO (g) + 3H₂ (g) CH₄ (g) + H₂O (g)

• The reaction would not be affected.
• The equilibrium would shift to the right.
• The equilibrium would shift to the left.
• The product concentration would equal the reactants.

Question 3: If the half-life of Technitium-104 is 18.0min, how much of a 14.2g sample will remain after 72 minutes?

• 3.55g
• 1.78g
• 0.888g
• 0.444g

Question 4: How many milliliters of a 1.25 molar hydrochloric acid (HCl) solution would be needed to react completely with 60.0 grams of calcium metal?

Ca (s) + 2HCl (aq) CaCl₂ (aq) + H₂ (g)

• 1200 ml
• 2400 ml
• 3750 ml
• 9600 ml

Question 5: Which of the following statements is not true of gamma radiation?

• Gamma rays have no mass.
• Gamma rays severely damage living cells.
• Gamma rays are high frequency electromagnetic waves.
• Gamma rays are deflected toward the positive terminal in a magnetic field.