alleryStart learning →What happens to the starting substances during a chemical reaction?
AThey change into smaller pieces
BThey change only their colour
CThey change into new substances
DThey change only their shape
Answer & Solution
Correct answer: C. They change into new substances
1. A chemical reaction turns one or more substances into different ones.
2. The new substances have their own properties, which is why we notice a change.
3. Cutting or crushing only changes shape and size, so that is a physical change.
_Source: Siyavula Natural Sciences Grade 8 (CC BY 4.0), How do we know a chemical reaction has taken place?_
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