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Science
9th -
12thgrade
Synthesis and Decomposition Reactions
25 questions
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- 1. Multiple ChoiceA decomposition reaction can be represented as _____________________.AB → A + BA + B → ABAB + CD → AC + BDA + BC → B + AC
- 2. Multiple ChoiceA chemical change in which a single compound breaks down into two or more simpler products is called a ______________________.single-replacement reactionsynthesis reactiondouble-replacement reactiondecomposition reaction
- 3. Multiple ChoiceThis chemical equation for mercury oxide is an example of what type of reaction?
2HgO → 2Hg + O2decomposition reactionsynthesis reactioncombustion reactionMarvin the Martian reaction - 4. Multiple ChoiceA chemical change in which two or more substances react to form a new substance is a ____________________________.decomposition reactionsynthesis reactiondouble displacement reactioncombustion reaction
- 5. Multiple ChoiceA synthesis reaction can be represented as ________________________.AB + CD → AC + BDAB → A + BA + B → ABA + BC → B + AC
- 6. Multiple ChoiceThis chemical equation for magnesium oxide is an example of what type of reaction?
2Mg + O2 → 2MgOdecomposition reactionsynthesis reactionsingle displacement reactioncombustion reaction - 7. Multiple ChoiceWhich of the following is an example of synthesis?Na + Br2 --> NaBrKClO3 --> KCl + O2HgO + Cl2-->HgCl + O2Cl2 + NaBr --> NaCl + Br2
- 8. Multiple ChoiceWhat is decomposition?putting substances togetherbreaking substances apartelement replacing another element in a compoudburning of a subtance
- 9. Multiple ChoiceWhat type of chemical reaction is this?
Al(OH)3 → Al2O3 + H2ODecompositionCombustionSynthesisSingle Replacement - 10. Multiple ChoiceThe number of atoms you begin with in a chemical reaction ...must be the same as the number of atoms you end withmust be an even numbercan be different to the number you finish withchanges depending on how much energy is formed
- 11. Multiple Choice
Is a change in matter that produces one or more new substances
precipitate
endothermic reaction
chemical reaction
activation energy
- 12. Multiple Choice
A solid that forms from a solution during a chemical reaction
precipitate
concentration
chemical reaction
inhibitor
- 13. Multiple Choice
A substance that speeds up chemical reactions
activation energy
catalyst
precipitate
chemical reaction
- 14. Multiple Choice
A substance that slows down a chemical reaction
concentration
catalyst
inhibitor
activation energy
- 15. Multiple Choice
The total mass of the reactants must equal the total mass of products. Matter is never created or destroyed
Conservation of Mass
Pascal's Principle
catalyst
inhibitor
- 16. Multiple ChoiceCxHy +O2 --> H2O + CO2DecompositionDouble replacementCombustionSingle Replacement
- 17. Multiple ChoiceOne element replaces another in a compound.SynthesisCombustionSingle ReplacementDouble Replacement
- 18. Multiple ChoiceThis pictures simulates what type of reaction?SynthesisDecompositionSingle ReplacementDouble Replacement
- 19. Multiple ChoiceThe reactants are on the left side of the chemical equation.TrueFalse
- 20. Multiple ChoiceWhat are the products of the chemical reaction pictured?CH4 and CO2CH4 and O2CO2 and H2OO2 and H2O
- 21. Multiple ChoiceConsider the chemical equation CH4 + 2 O2 → CO2 + 2 H2O. In this equation, CH4 is aproductreactantdisplacement
- 22. Multiple ChoiceWhat is the right part of a chemical equation called?
H2 + O → H2OReactantsProductsYieldsChemical Equation - 23. Multiple Choice2H2 + O2 ----> 2H2O What is the product?------>2H2O2H2+ O2
- 24. Multiple ChoiceIdentify the reactant(s) and product(s) of the reaction.All three are reactants and none are products.Hydrogen and water are the reactants, and oxygen is the product.Water and oxygen are the reactants, and hydrogen is the product.Hydrogen and oxygen are the reactants, and water is the product.
- 25. Multiple ChoiceIn the reaction methane + oxygen turns into carbon dioxide + water, the methane and oxygen are called _______________.reactantsproductsneutralsenergizers
- Answer choicesTagsAnswer choicesTags