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Chemical Reactions and Equations Quiz

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Questions and Answers

How is a chemical reaction recognized?

By observing change in state, color, or evolution of gas (correct)

By measuring the pH level

By analyzing crystal structure

By observing change in weight

What is a chemical equation used to represent?

Biological reactions

Nuclear reactions

Chemical reactions (correct)

Physical changes

Why do we balance a chemical equation?

To increase the rate of the reaction

To make the equation look more complex

To ensure the number of atoms of each element remains the same (correct)

To change the nature of the reaction

What is used to represent a gaseous substance in a chemical equation?

(g) Signup and view all the answers

What type of reaction is represented by the formation of Ca(OH)2 from CaO and H2O?

Combination reaction Signup and view all the answers

What is used to represent a gaseous substance in a chemical equation?

(g) Signup and view all the answers

What is the purpose of balancing a chemical equation?

To ensure the conservation of mass and atoms Signup and view all the answers

What does the chemical equation 3 Fe(s) + 4H2O(g) $\rightarrow$ Fe2O3(s) + 4H2(g) represent?

Balanced chemical equation Signup and view all the answers

Which type of reaction is represented by the formation of Ca(OH)2 from CaO and H2O?

Combination reaction Signup and view all the answers

How can a chemical reaction be recognized?

By observing change in state, color, evolution of gas, or change in temperature Signup and view all the answers

Chemical Reactions and Equations Quiz

Choose a study mode

Podcast

Questions and Answers

How is a chemical reaction recognized?

What is a chemical equation used to represent?

Why do we balance a chemical equation?

What is used to represent a gaseous substance in a chemical equation?

What type of reaction is represented by the formation of Ca(OH)2 from CaO and H2O?

What is used to represent a gaseous substance in a chemical equation?

What is the purpose of balancing a chemical equation?

What does the chemical equation 3 Fe(s) + 4H2O(g) $\rightarrow$ Fe2O3(s) + 4H2(g) represent?

Which type of reaction is represented by the formation of Ca(OH)2 from CaO and H2O?

How can a chemical reaction be recognized?

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Chemical Reactions and Equations Quiz

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Chemical Reactions and Equations Quiz

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