You are using an outdated browser. Please upgrade your browser to improve your experience and security.
Question: S + O2 →  SO2
Answer: In synthesis reactions, two or more reactants combine to form a single product.
Question: 2H2O → 2H2 + O2
Answer: In decomposition reactions, a single reactant is broken down into two or more products.
Question: Zn + 2HCl → H2 + ZnCl2
Answer: Also known as substitution or single replacement, a single displacement reaction consists of a single element replacing one of the elements in a compound.
Question: HCl + NaOH → NaCl + H2O
Answer: Double displacement reactions are basically an exchange of partners.
Question: 2Na + 2H2O → 2NaOH + H2
Answer: In a single displacement reaction, a single free element is substituted for one of the elements in a compound.
Question: 2Na + Cl2 → 2NaCl
Answer: Synthesis reactions are those in which two or more reactants unite to produce a single product.
Question: CaCO3 + 2HCl → CaCl2 + H2CO3
Answer: In the double displacement of ionic compounds, the positive and negative ions of each reactant are flipped in the products.
Question: CaCO3 → CaO + CO2
Answer: In chemistry, decomposition is the breaking down of a single reactant into two or more products.
Double exposure of science laboratory test tubes with bokeh and chemical reaction

Types of Chemical Reactions

{{(vm.state.currentQuestion + 1)}} of {{vm.questions.length}}
Types of Chemical Reactions
You finished!
Your Score: {{vm.state.numberCorrect}} / {{vm.questions.length}}
Play Next Quiz
{{(vm.state.currentQuestion + 1)}} of {{vm.questions.length}}
{{vm.state.numberCorrect}}/{{vm.questions.length}} correct
{{vm.state.score|number:0}}/{{vm.maxPoints}} points
Your results
Question {{($index + 1)}}
Your Answer:
{{vm.state.responses[$index].isCorrect ? 'Your' : ''}} Correct Answer:
Are you a quizmaster?
Compare your score
Max Score: {{vm.maxPoints}}
Your Score
Community Average
High scores
or to track your quiz stats, save your best scores, and compete with the community!
Your preference has been recorded
What were the year’s biggest stories?
Year In Review 2019