Word equations practice exercise 3

Question 1

Which two elements combine to form carbon dioxide? Write the correct word equation. Is carbon dioxide a mixture or a compound? Give a reason.  (3 marks)

Question 2

Which two elements combine to form carbon dioxide? Write the correct word equation. Is carbon dioxide a mixture or a compound? Give a reason.  (3 marks)

Question 3

Which two elements combine to form carbon dioxide? Write the correct word equation. Is carbon dioxide a mixture or a compound? Give a reason.  (3 marks)

Question 4

Which two elements combine to form carbon dioxide? Write the correct word equation. Is carbon dioxide a mixture or a compound? Give a reason.  (3 marks)

Question 5

A learner describes the formation of copper oxide using this word equation: Copper + Air → Copper oxide What is wrong with the way the learner wrote the reactants?  (1 mark)

Question 6

A learner observes that when sodium metal is added to chlorine gas in a special lab setup, a bright yellow flame is produced, and a white solid forms as shown below. Explain what happens in this reaction and write the correct word equation. Why is the product a compound and not a mixture?  (2 mark)

Question 7

A learner observes that when sodium metal is added to chlorine gas in a special lab setup, a bright yellow flame is produced, and a white solid forms as shown below. Explain what happens in this reaction and write the correct word equation. Why is the product a compound and not a mixture?  (2 mark)

Question 8

A learner observes that when sodium metal is added to chlorine gas in a special lab setup, a bright yellow flame is produced, and a white solid forms as shown below. Explain what happens in this reaction and write the correct word equation. Why is the product a compound and not a mixture?  (2 marks)

Question 9

A learner observes that when sodium metal is added to chlorine gas in a special lab setup, a bright yellow flame is produced, and a white solid forms as shown below. Explain what happens in this reaction and write the correct word equation. Why is the product a compound and not a mixture?  (2 marks)

Question 10

A learner observes that when sodium metal is added to chlorine gas in a special lab setup, a bright yellow flame is produced, and a white solid forms as shown below. Explain what happens in this reaction and write the correct word equation. Why is the product a compound and not a mixture?  (2 marks)

Question 11

A student burns charcoal (carbon) in a container filled with oxygen gas. After the reaction, a colourless gas is collected as shown below. Explain what gas is formed and write the correct word equation for the reaction. Why is the product considered a new substance?  (2 marks)

Question 12

During a heating experiment, a shiny piece of copper turns black when heated strongly in air. What is happening to the copper in this reaction? Write a word equation. (2 marks)

Question 13

During a heating experiment, a shiny piece of copper turns black when heated strongly in air. What is happening to the copper in this reaction? Write a word equation. (2 marks)

Question 14

During a heating experiment, a shiny piece of copper turns black when heated strongly in air. What is happening to the copper in this reaction? Write a word equation. (2 marks)

Question 15

Mary wrote the word equation below to show how sodium chloride forms: Sodium + Chlorine → Salt Identify the mistake Mary made in her word equation.  (1 mark)

Question 16

Mary wrote the word equation below to show how sodium chloride forms: Sodium + Chlorine → Salt Identify the mistake Mary made in her word equation.  (1 mark)

Question 17

Mary wrote the word equation below to show how sodium chloride forms: Sodium + Chlorine → Salt Identify the mistake Mary made in her word equation.  (1 mark)

Question 18

Name the elements that combine to form aluminium oxide. Write the correct word equation. (2 marks)

Question 19

Name the elements that combine to form aluminium oxide. Write the correct word equation. (2 marks)

Question 20

Name the elements that react to form sodium chloride. Write the correct word equation for this reaction. What type of substance is formed as a result?  (3 marks)

Question 21

Name the elements that react to form sodium chloride. Write the correct word equation for this reaction. What type of substance is formed as a result?  (3 marks)

Question 22

Name the elements that react to form sodium chloride. Write the correct word equation for this reaction. What type of substance is formed as a result?  (3 marks)

Question 23

Name the elements that react to form sodium chloride. Write the correct word equation for this reaction. What type of substance is formed as a result?  (3 marks)

Question 24

The diagram below shows a piece of copper turning black after being heated in the presence of air. What is the name of the black compound formed? Write the word equation for this reaction and list the two elements involved. (3 marks)

Question 25

The diagram below shows a piece of copper turning black after being heated in the presence of air. What is the name of the black compound formed? Write the word equation for this reaction and list the two elements involved. (3 marks)

Question 26

The diagram below shows a piece of copper turning black after being heated in the presence of air. What is the name of the black compound formed? Write the word equation for this reaction and list the two elements involved. (3 marks)

Question 27

The diagram below shows a piece of copper turning black after being heated in the presence of air. What is the name of the black compound formed? Write the word equation for this reaction and list the two elements involved. (3 marks)

Question 28