Q50 of 400 Page 133

Why does aluminium not react with water under ordinary conditions?

A thin layer of aluminium oxide is there on the surface of aluminium. This Layer of aluminium oxide prevent aluminium to react with water under ordinary condition.

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49 State one use each of the following non-metals: Hydrogen, Carbon (as Graphite), Nitrogen, Sulphur 49 Name the metal which is used in making thermometers. 50 Name two metals which can displace hydrogen from dilute acids. 50 Name two metals which cannot displace hydrogen from dilute acids.