CHEMICAL ANS PHYSICAL CHANGE

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include melting, freezing, and dissolving.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. It involves a chemical reaction and includes processes like burning, rusting, and digestion.

Front

Which of the following is NOT an example of a physical change? crumpled paper, pencil sharpening, shrunken clothing, rust

Back

Rust is NOT an example of a physical change; it is a chemical change.

Front

What are some indicators of a chemical change?

Back

Indicators of a chemical change include fizzing, foaming, color change, temperature change, and the production of gas or precipitate.

Front

Is ice melting a chemical or physical change?

Back

Ice melting is a physical change.

Front

What happens during the digestion of food?

Back

During digestion, food undergoes a chemical change as it is broken down into simpler substances by enzymes and acids.

Front

What is an example of a chemical change in everyday life?

Back

An example of a chemical change in everyday life is the rusting of iron when it reacts with oxygen and moisture.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change does not alter the chemical composition of a substance, while a chemical change results in the formation of new substances.

Front

What is an example of a physical change?

Back

An example of a physical change is the sharpening of a pencil.

Front

What occurs when hydrochloric acid reacts with potassium hydroxide?

Back

When hydrochloric acid reacts with potassium hydroxide, it produces a salt, water, and heat, which is a chemical change.