Adaptive Practice
Chemical Reactions
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Question 1 of 10
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Easy
Which of the following is a chemical change?
Easy
In the reaction: 2H₂ + O₂ → 2H₂O, what type of reaction is taking place?
Easy
Which gas is released when zinc reacts with dilute hydrochloric acid?
Medium
What is the correct balanced chemical equation for the reaction between magnesium and oxygen?
Medium
Which of the following is an example of a displacement reaction?
Medium
During photosynthesis, plants convert carbon dioxide and water into glucose and oxygen. What type of chemical reaction is this?
Easy
Which of the following statements about exothermic reactions is correct?
Hard
In the reaction 2KClO₃ → 2KCl + 3O₂, what is the role of heat?
Easy
Which of the following is NOT a characteristic of a chemical reaction?
Medium
What type of reaction is represented by: NaOH + H₂SO₄ → Na₂SO₄ + H₂O?