PM2 Review Questions 2023

Front

What happens to liquids when left undisturbed in a graduated cylinder overnight?

Back

The liquids may separate based on their densities, with the denser liquids settling at the bottom.

Front

What is the best procedure to separate salt from a mixture of water, iron filings, sand, and salt?

Back

Dissolve the mixture in water, filter out the sand and iron filings, and then evaporate the water to obtain the salt.

Front

What factors least impact the rate of dissolving a solid in water?

Back

Air pressure of the area has the least impact on the rate of dissolving.

Front

What is the characteristic of gas particles in a container?

Back

Gas particles completely occupy and take the shape of the container.

Front

What process represents boiling in the water phase change diagram?

Back

Process D represents boiling.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that retain their individual properties.

Front

What is the definition of filtration?

Back

Filtration is a process used to separate solids from liquids or gases using a filter.

Front

What is evaporation?

Back

Evaporation is the process by which liquid turns into vapor at temperatures below its boiling point.

Front

What is density?

Back

Density is the mass of a substance divided by its volume, often expressed in grams per cubic centimeter (g/cm³).

Front

What is the difference between a solution and a suspension?

Back

A solution is a homogeneous mixture where the solute is completely dissolved, while a suspension contains larger particles that can settle out.