/

Which of the following would result in an increase in the chemical reaction?

A. Adding more of the product

B. Decreasing the concentration of the reactant

C. Sealing the reaction in an airtight container

D. Using a mortar and pestle to grind a solid reactant to a powder

Answer Explanation:

Crushing a solid reactant into powder increases the surface area of the reactant, thereby increasing chemical reaction. This is because more of the reacting molecules or ions are exposed to the other reactant, which increases the chance of particles colliding and leads to more successful collisions per second.

Therefore, the Correct Answer is D.

Q #1: When a volcano erupts, its actions are similar to which of the following events?

A. A food eroding the banks of a stream

B. A can of soda fling when it is opened

C. A tree root pushing up through the pavement

D. A building burning to the ground

Answer Explanation

Both involve the release of pressure from a confined space. In the case of a volcano, pressure builds up beneath the Earth's surface, causing an eruption. Similarly, when a can of soda is opened, the release of pressure inside the can causes the soda to fizz and potentially spray out.
Q #2: Which of the following would result in an increase in the chemical reaction?

A. Adding more of the product

B. Decreasing the concentration of the reactant

C. Sealing the reaction in an airtight container

D. Using a mortar and pestle to grind a solid reactant to a powder

Answer Explanation

Crushing a solid reactant into powder increases the surface area of the reactant, thereby increasing chemical reaction. This is because more of the reacting molecules or ions are exposed to the other reactant, which increases the chance of particles colliding and leads to more successful collisions per second.
Q #3: Water molecules enter cells by which of the following transport mechanisms?

A. Gated channels

B. Proton pumps

C. Facilitated diffusion

D. the following transport mechanisms?

Answer Explanation

Water molecules are polar and cannot easily cross the hydrophobic lipid bilayer of the cell membrane. They use aquaporins, which are water channels that allow water to pass through.

Free Access on TEAS 7 Exams and Study Notes

Access to all TEAS 7 Exams
Performance Tracking and Analysis
Well Documented and Explained Questions and Answers
2000+ Questions and Correct Answers: Answers Well Explained
Libary of Detailed StudyNotes
Topical Questions and Answers on Examinable topics

Join Now