4.5 Hydrogen and oxygen also react spectacularly. Describe what will happen if hydrogen and oxygen react with each other. (2)

5.6 What is the pH-value of water? (1)  

2.4 Acid base reactions are exchange reactions. (1)  

3.1.2 Name the reactant(s) in this chemical equation.  (1)

4.3 What is the systematic name of the product of the reaction between phosphorus and oxygen?   (1)

3.2 Balance the following chemical equation: (2)   [1]SO2+[2]O2 →[3]SO3      

1.4 Which one of the following characteristics is not a characteristic of an acid? (2)  

1.2 Group 17 on the periodic table is known as: (2)  

5.3 Complete the following sentence by filling in the missing words: Red litmus paper remains red in the presence of a [1] and a [2] (2)

5.4 What do you think will happen when an acid and a base mix? (1)