Answer:
See explanation
Step-by-step explanation:
On a certain day, our teacher came to class with a container having some salt, some sand and a few pieces of iron in it. She was about to introduce a lesson on separation of mixtures.
Then she held a large bar magnet close to the mixture and shook it, the pieces of iron were attracted by the magnet and separated from the mixture.
Next, she poured some water into the mixture and the salt dissolved. She got a filter paper and separated the solution from the sand.
Then she heated the solution to dryness in an open crucible and the salt was recovered.