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)

4.1 Describe what you will see the moment phosphorus reacts with oxygen?  (1)  

QUESTION 4 The following photo shows phosphorus which is classified as a non-metallic element on the periodic table. Answer the following questions about the reaction of phosphorus with oxygen. Right click on the blue button below to view the image of phosphorus in a new tab:      

2.3 Non-metallic oxides form base solutions when they are dissolved in water. (1)  

3.1.1 Write down a word equation for this reaction.   (2)   [1]-> [2]+[3]    

SECTION A  QUESTION 1 CHOOSE THE CORRECT ANSWER.  1.1 Which of the following options indicates the number of protons at the center nucleus of atoms.   (2)

SECTION B  QUESTION 3 3.1 Right click on the blue button below to view a diagram illustrating the decomposition of magnesium oxide in a new tab and answer the questions that follow:    

5.5 The following chemical equation is an example of an exchange reaction between an acid and a base. Complete the chemical equation by filling in the missing compound. HCl+ NaOH → [1] + H2O (1)  

1.3 Which of the following formulas represent a sodium hydroxide molecule?  (2)