If only the shape of a substance changes in a process and no new substance is formed, what type of change is it called?
Answer and explanation
Correct answer: Physical change
The governing criterion is whether the chemical composition changes. In a physical change, a substance may be cut, bent, crushed, reshaped, or changed in state while its composition remains unchanged. Since only the shape changes and no new substance forms, option A is correct. A chemical change forms substances with new compositions; redox and precipitation are particular chemical processes and therefore do not describe this situation.
Frequently asked questions
What is the correct answer to this question?
Physical change
Why is this the correct answer?
The governing criterion is whether the chemical composition changes. In a physical change, a substance may be cut, bent, crushed, reshaped, or changed in state while its composition remains unchanged. Since only the shape changes and no new substance forms, option A is correct. A chemical change forms substances with new compositions; redox and precipitation are particular chemical processes and therefore do not describe this situation.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
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