NYSTCE ATAS NYSTCE Chemistry 3

Question 1

According to Boyle's Law, if the pressure on a gas doubles at constant temperature, what happens to the volume?

Accepted Answer

It is reduced by half

Answer

Boyle's Law states that pressure and volume are inversely proportional at constant temperature, so doubling pressure halves the volume.

Question 2

Which of the following is a physical change?

Accepted Answer

Water boiling

Answer

Boiling water is a physical change because only the state changes from liquid to gas; the chemical composition of water (H₂O) remains the same.

Question 3

The pH scale measures the concentration of which ion in a solution?

Accepted Answer

Hydronium ions (H₃O⁺) or hydrogen ions (H⁺)

Answer

pH measures the concentration of hydrogen ions (H⁺) or hydronium ions (H₃O⁺) in solution; lower pH means higher H⁺ concentration.

Question 4

Carbon-14 is used in radioactive dating because it undergoes radioactive decay. This is an example of which type of nuclear change?

Accepted Answer

Transmutation by beta decay

Answer

Carbon-14 decays by beta emission, converting a neutron to a proton, which is a form of transmutation called beta decay.

Question 5

Which laboratory tool is MOST appropriate for measuring the volume of a liquid accurately?

Accepted Answer

Graduated cylinder

Answer

A graduated cylinder has precise volume markings and is specifically designed for accurate liquid volume measurement in lab settings.

NYSTCE ATAS - NYSTCE Assessment of Teaching Assistant Skills Practice Test