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)   -> +    

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 → + H2O (1)  

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

3.3 Write the systematic name of the product of the chemical equation in question 3.2 (2)  

QUESTION 6   6.1 Choose the chemical formula that represents the laboratory acids shown below:   Nitric acid: Sulphuric acid (2)  

Which of the following statements regarding retirement planning is correct?