UN chief Ban visits ECCC, meets staff

The video tutorial briefly introduces the concept of 'constellation chemical' and provides a clarification or correction at the end.

What is a constellation?

• A single star in the sky

• A planet in the solar system

• A group of stars forming a recognizable pattern

• A type of chemical compound

Which of the following is a characteristic of a chemical property?

• It is related to the physical state of a substance

• It describes the color of a substance

• It involves a substance's ability to undergo a chemical change

• It is the weight of a substance

What does a chemical property indicate?

• The ability of a substance to react with other substances

• The temperature at which a substance melts

• The density of a substance

• The volume of a substance

Which of the following is NOT a chemical property?

• Flammability

• Boiling point

• Reactivity with water

• Acidity

How can chemical properties be observed?

• By measuring the mass of a substance

• By determining the shape of a substance

• By looking at the color of a substance

• By observing a substance's interaction with other chemicals