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- 1. Multiple ChoiceThe substances that are present before a reaction are the...reactantsproductsboth of theseneither of these
- 2. Multiple Choice___________________ are the elements or compounds that are formed in a chemical
reaction.PolymersBondsReactantsProducts - 3. Multiple Choice_______________ can speed up the rate of reactions and/or lower the amount of energy needed for
the reaction to take place.CarbohydratesFuel sourceChemicalCatalyst - 4. Multiple ChoiceA change in which NEW substances are formed.Chemical changePhysical changeCasual changeFormal change
- 5. Multiple ChoiceElement or compound?
H2Oelementcompound - 6. Multiple ChoiceCompounds break down into simpler substances in this type of reaction.....Double ReplacementSingle ReplacementSynthesisDecomposition
- 7. Multiple ChoiceName this reaction, CO2 + H2O --> H2CO3DecompositionSingle ReplacementSynthesisCombustion
- 8. Multiple ChoiceHow many atoms are there TOTAL in:
H2SO46573 - 9. Multiple Choice
Is melting an object technically known as a chemical reaction?maybe?YesNo - 10. Multiple ChoiceWhat is decomposition?putting substances togetherbreaking substances apartelement replacing another element in a compoudburning of a subtance
- 11. Multiple ChoiceA change in the size, shape, or state of matter.chemical changephysical changechemical reactionelectron change
- 12. Multiple ChoiceHow many elements are in H2O?1234
- 13. Multiple ChoiceHow many atoms of carbon (C) are in C6H12O6?361224
- 14. Multiple ChoiceWhich of the following is a compound?CoO2CCO2
- 15. Multiple ChoiceExothermic reactions...Absorb energyRelease energyRelease ColorAbsorb Color
- 16. Multiple ChoiceThe only way you can be certain that a chemical reaction has occurred is by?Light has been emitteda colour change has occurredbubbles appearidentifying one or more new chemical products
- 17. Multiple ChoiceHeating up two reactants will make the reaction...stay the samego slowerbecome constantgo faster
- 18. Multiple ChoiceHow can you increase the rate of a reactionDecrease the pressureIncrease the rate of collisionsDecrease the concentrationIncrease the concentration
- 19. Multiple ChoiceWill increasing the surface area of a catalyst make a difference to the speed of the reaction?yesno
- 20. Multiple ChoiceWhat is the rate of reaction?How fast a reaction isHow big a reaction isHow loud a reaction isHow much gas a reaction produces
- Answer choicesTagsAnswer choicesTags