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With the help of an activity, explain the conditions under which iron articles get rusted.
Write a test to identify the gas evolved (if any) during the reaction of these metals with water.
When 2 mL of sodium hydroxide solution is added to few pieces of granulated zinc in a test tube and then warmed, the reaction that occurs can be written in the form of a balanced chemical equation as :
It is observed that Calcium on reaction with water floats on its surface. Explain why it happens. Also write a balanced chemical equation for the reaction that occurs. What happens when the aqueous solution of the product of this reaction reacts with Carbon dioxide gas ? Write a balanced chemical equation for the reaction.
Explain the following terms with one example each.
Write equations for the reactions of (i) iron with steam (ii) calcium and potassium with water
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