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Question
What will you take into account while identifying the following?
A chemical change in a substance.
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Solution
Chemical changes are changes that involve the reaction of substances with one another. Such reactions result in alterations in the chemical compositions of the substances involved. These changes lead to the formation of new substances.
Characteristics:
- One or more new substances are formed during a chemical change.
- Most chemical changes cannot be reversed easily.
- The chemical composition of a substance undergoing chemical change does not remain the same.
- A chemical change is always accompanied by a change in energy.
RELATED QUESTIONS
A physical change is temporary. Explain.
State whether the following is physical or chemical changes.
shaping a piece of glass —
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What will you take into account while identifying the following?
A physical change in a substance.
Change is the law of nature and occurs in our everyday life, at all times and in all places. Differentiate between the following change with a suitable example.
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Give an example to justify the statement that physical changes can be reversible as well as irreversible.
