Q64 of 400 Page 134

What is meant by the reactivity series of metals? Arrange the following metals in an increasing order of their reactivity towards water:

Zinc, Iron, Magnesium, Sodium

when the metals are arranged in a vertical column of decreasing order of reactivity then that arrangement is known as reactivity series of metals. . Increasing order of reactivity: Iron < zinc < magnesium < sodium

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63 Name a non-metal which is extremely hard. 63 How do non-metals react with oxygen? Explain with an example. Give equation of the reaction involved.

What is the nature of the product formed? How will you demonstrate it?

 64 Hydrogen is not a metal but still it has been assigned a place in the reactivity series of metals. Why? 64 Name one metal more reactive and another less reactive than hydrogen.