9 Questions
What is a chemical reaction?
When a new substance with new properties is formed
In a chemical reaction, what happens to the constituent atoms of the reactants?
They are rearranged to form new substances
What distinguishes a physical change from a chemical change?
Formation of new substances with new properties
Which of the following is an example of a physical change?
Water changing to steam on boiling
What kind of changes occur when copper sulphate reacts with iron?
Formation of ferrous sulphate and copper
How can you determine a chemical reaction?
By observing if new substances are formed
What allows differentiation between steam and water when they react with sodium?
They react in the same way and give the same products
When does a chemical reaction involve only a change in state?
When there's no formation of new substances
What happens during a physical change?
Only physical appearance is altered with no new substances formed
Test your knowledge on chemical reactions and equations. Learn about how atoms are rearranged, new substances are formed, and the difference between physical and chemical changes.
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