Perform the following reactions and classifying them as physical or chemical changes: a) Iron with copper sulphate solution in water b) Burning of magnesium ribbon in air c) Zinc with dilute sulphuric acid d) Heating of copper sulphate crystals e) Sodium sulphate with barium chloride in the form of their solutions in water.

A. when an iron nail is dipped in copper sulphate, a brown coating of copper is formed on the surface of the iron and the colour of copper sulphate solution changes from blue to light green. this reaction shows that iron is more reactive than copper as it displaces copper from its solution and iron passes into solution as Fe{||} ions and ferrous sulphate solution is formed. its a physical change as it would not change into a completely new substance with new properties.

Explanation:

108

explanation:

ergfywefywefdwuduweefuy

the correct answer is option d

explanation:

i was wrong its d because they dont use cm when calculating square roots