In connection with the topic "CHEMICALS AND CHEMICAL CHANGES"... the students performed experiments to understand the physical and chemical changes.
Students were given a mixture of sulphur and iron powder and were asked if they could seperate, they seperated by using a bar magnet and concluded that physical changes are reversible.
Students were given sodium hydroxide pellets and dilute HCl, they added and found the reaction occuring, and inferred that chemical changes are irreversible.
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