Q2 of 31 Page 46

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:



More from this chapter

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2

Explain the meanings of malleable and ductile.

 1

Why sodium is kept immersed in kerosene oil?

 3

Samples of four metals A, B, C and D were taken and added to the solutions given in the following table, one by one. The results obtained are as follows:






































Metal



Iron (II) sulphate



Copper (II) sulphate



Zinc sulphate



Silver nitrate



A



No reaction



Displacement





B



Displacement




No reaction




C



No reaction



No reaction



No reaction



Displace



D



No reaction



No reaction



No reaction



No reaction



Use the above table to answer the following questions about metals A, B, C and D:


(i) Which is the most reactive metal?


(ii) What would you observe when metal B is added to a solution of copper (II) sulphate?


(iii) Arrange the metals A, B, C and D in the order of decreasing reactivity.

 4

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.