Chemical Reactions
Quiz by Larissa Kelly
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18 questions
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- Q1In a chemical reaction, what is the substance present at the beginning of the reaction called?CatalystProductReactantInhibitor30s
- Q2What is the term for a substance that speeds up a chemical reaction without being consumed in the reaction?ReactantCatalystProductInhibitor30s
- Q3Which type of chemical reaction releases heat to the surroundings?OxidationCombustionExothermicEndothermic30s
- Q4Which type of chemical reaction absorbs heat from the surroundings?DecompositionEndothermicRedoxExothermic30s
- Q5In an exothermic reaction, the products have ________ energy than the reactants.equalnomoreless30s
- Q6In an endothermic reaction, the products have ________ energy than the reactants.moreequallessno30s
- Q7Which of the following is an example of an exothermic reaction?Neutralization reactionBurning of woodPhotosynthesisMelting of ice30s
- Q8Which statement best describes the law of conservation of mass?Mass can only be destroyed in an open systemMass can be created or destroyed in any systemMass can only be created in a closed systemThe total mass of a closed system remains constant over time30s
- Q9Which of the following is an example of a physical change?Rusting ironCrushing a canBurning paperBaking a cake30s
- Q10Which of the following is an example of a chemical change?Mixing salt and waterCutting paperBurning woodMelting ice30s
- Q11Which of the following is a change in state from solid to liquid?EvaporationCondensationMeltingFreezing30s
- Q12Which of the following is a change in state from liquid to solid?FreezingEvaporationMeltingCondensation30s
- Q13Which of the following is a change in state from gas to solid?CondensationDepositionVaporizationSublimation30s
- Q14Which of the following is a change in state from solid to gas?DepositionVaporizationSublimationCondensation30s
- Q15Which of the following equations demonstrates the conservation of mass in reactants and products?2Na + Cl₂ → 2NaCl2H₂O → 2H₂ + O₂H₂ + O₂ → 2H₂OC₆H₁₂O₆ → 2C₂H₅OH + 2CO₂30s