Adaptive Practice
Chemical Reactions and Equations
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Question 1 of 10
⏱ 0:30
Easy
Which of the following is a chemical change?
Medium
In the reaction: Zn + 2HCl → ZnCl₂ + H₂, what type of reaction is taking place?
Medium
Which of the following is the correct balanced chemical equation for the combustion of methane (CH₄)?
Easy
Which gas is released when an acid reacts with a metal carbonate?
Hard
In the reaction 2KClO₃ → 2KCl + 3O₂, what is the role of KClO₃?
Easy
Which of the following is an example of an exothermic reaction?
Easy
What is observed when a burning candle is placed inside a closed jar?
Medium
Which of the following statements is true for a displacement reaction?
Medium
In the reaction: Fe + CuSO₄ → FeSO₄ + Cu, which metal is more reactive?
Easy
Which of the following is NOT a characteristic of a chemical reaction?