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This is because the reaction taking place is a displacement reaction, meaning that one element is being displaced by another. 

So what is being displaced?:

If you look...

1. The electrons/ Pi bonds are delocalised2. It is made up of six Carbons in a ring with two rings of electon density above and below the plane of the ring.3. It has a lower electron density than alken...

A catalyst lowers the activation energy of a reaction and therefore increases the rate of reaction. The catalysts reacts with the reactants but is regenerated again i...

If you add an acid to a metal oxide you get a salt and water.

For example: 

HCl + NaOH ---> NaCl + H₂O