Non Metals


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       Non-metals are also called electronegative elements because the non-metal atom form negatively charged ion by accepting electrons. Following are the important chemical reactions of non-metals.

1. Reaction of Non-metals with Oxygen

       All non-metals react with oxygen to form acidic or neutral oxides. For example, Carbon forms acidic carbon dioxide on reacting with oxygen.

C      +      O2           CO2
     Carbon                                        Carbon Dioxide

In the same way sulphur reacts with oxygen of air to form acidic sulphur dioxide.

S      +      O2           SO2
     Sulphur                                         Sulphur Dioxide

2. Reaction of Non-metals with Water

       Non-metals do not react with water.

3. Reaction of Non-metals with Dilute Acids

       Non-metals do not react with dilute acids and don’t displace hydrogen from dilute acids, because non-metals are electron acceptor. So, they cannot supply electrons to H+ ions. So, they do not displace hydrogen from dilute acids.

4. Reaction of Non-metals with Chlorine

       Non-metals react with chlorine to form covalent chlorides. For example,

H2      +      Cl2           2HCl
      Hydrogen     Chlorine                      Hydrogen chloride

P4      +      6Cl2           4PCl3
         Phosphorous    Chlorine                      Phosphorous trichloride

5. Reaction of Non-metals with Hydrogen

       Non-metals react with hydrogen to form covalent Hydrides. For example,

H2      +      S           H2S
      Hydrogen     sulphur                      Hydrogen sulphide

N2      +      3H2           2NH3
Nitrogen     Hydrogen                            Ammonia

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