Chemical Reactions Quiz

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Test your knowledge of reactions.

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Swabir Ssemwanga

Uganda

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Chemical Reactions Quiz


Chemical Reactions QuizVersión en línea Test your knowledge of reactions. por Swabir Ssemwanga 1 What indicates that a chemical reaction has occurred? a A change in temperature without new substances b Dissolving a solute in solvent c Only a color change d Formation of new substances with different properties 2 Which statement is true about balancing chemical equations? a Only the coefficients matter b You can change the subscripts freely c Matter is conserved; atoms on both sides must be equal d Atoms can appear or disappear during reactions 3 An exothermic reaction releases what? a Heat from the surroundings into the system b Heat to the surroundings c Energy only to light d No energy change occurs 4 Which factor does NOT affect the rate of a chemical reaction? a Presence of a catalyst b Concentration of reactants c Temperature d The color of the reactants 5 Le Chatelier's principle helps predict what when a system at equilibrium is disturbed? a Change in color of the solution b That all reactions are endothermic c No change in equilibrium position d Shift in the position of equilibrium to counter the disturbance 6 What is the role of a catalyst in a chemical reaction? a Speeds up the rate by lowering the activation energy b Becomes a product c Changes the equilibrium constant d Is consumed in the reaction 7 Which type of reaction is complete combustion of a hydrocarbon? a Synthesis reaction b Combustion reaction c Addition reaction d Single-displacement reaction 8 In redox reactions, what happens to oxidation states? a Oxidation states never change b Only energy changes c Electrons are transferred between species d All elements become ions 9 What best describes an acid-base neutralization? a A metal reacts with an acid to release hydrogen b An acid reacts with a base to form a salt and water c An acid and base react to form a gas d A salt dissolves without a reaction 10 Which reaction commonly forms a precipitate? a Synthesis reaction b Combination reaction c Double displacement (metathesis) reaction d Decomposition reaction

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Chemical Reactions Quiz

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Creada por

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Chemical Reactions QuizVersión en línea

por Swabir Ssemwanga

What indicates that a chemical reaction has occurred?

Which statement is true about balancing chemical equations?

An exothermic reaction releases what?

Which factor does NOT affect the rate of a chemical reaction?

Le Chatelier's principle helps predict what when a system at equilibrium is disturbed?

What is the role of a catalyst in a chemical reaction?

Which type of reaction is complete combustion of a hydrocarbon?

In redox reactions, what happens to oxidation states?

What best describes an acid-base neutralization?

Which reaction commonly forms a precipitate?