PAX PAX Chemistry and Physical Science 3

Question 1

What is the speed of light in a vacuum approximately equal to?

Accepted Answer

300,000 km/s

Answer

150,000 km/s

Answer

3,000 km/s

Answer

30,000 km/s

Question 2

Which of the following is an example of a mixture?

Accepted Answer

Saltwater solution

Answer

Pure water

Answer

Salt (NaCl)

Answer

Carbon dioxide (CO₂)

Question 3

What is the unit of electric current?

Accepted Answer

Ampere

Answer

Volt

Answer

Watt

Answer

Ohm

Question 4

What type of energy does a moving object possess?

Accepted Answer

Kinetic energy

Answer

Potential energy

Answer

Chemical energy

Answer

Thermal energy

Question 5

Which of the following has the lowest pH?

Accepted Answer

Orange juice (pH 3.5)

Answer

Black coffee (pH 5)

Answer

Milk (pH 6.5)

Answer

Baking soda solution (pH 8.5)

Question 6

What happens to the volume of a gas when temperature increases at constant pressure (Charles's Law)?

Accepted Answer

Volume increases

Answer

Volume decreases

Answer

Volume stays the same

Answer

Pressure increases