Question

characteristics of chemical changes​

Answer 1

Answer:

There are five signs of a chemical change:

Color Change.

Production of an odor.

Change of Temperature.

Evolution of a gas (formation of bubbles)

Precipitate (formation of a solid)

Explanation:

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Answer 2

Answer:

• A new substance or substance are formed in a chemical change.
• A chemical change is a permanent change.
• It is an irrelevant change.
• During a chemical change, a large amount of heat or light may be given out. These may be a change in colour, in smell or sound may be produced. For example, burning of crackers produces sound and light. When food gets spoilt, it produces foul smell.
• Both the physical and chemical properties of the substance change during a chemical change.

Explanation:

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