Q20 of 79 Page 3

Write equations for the reactions of:

(i) iron with steam


(ii) calcium with water


(iii) potassium with water

(i) Equation for the reaction of iron with steam is given below:


(ii) Equation for the reaction of calcium with water is as follows:



(iii) Equation for the reaction of potassium with water can be written as:


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What would you observe when zinc is added to a solution of iron (II) sulphate? Write the chemical reaction that takes place.

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Which gas is produced when dilute hydrochloric acid is added to a reactive metal? Write the chemical reaction when iron reacts with dilute sulphuric acid.

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Differentiate between metals and non-metals on the basis of their chemical properties.

 22

Give reason for the following:

(a) Aluminium oxide is considered as an amphoteric oxide.


(b) Ionic compounds conduct electricity in molten state.