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- 1. Multiple-choice1 minute1 ptWhat is the activation energy?The energy of the productsThe energy of the reactantsThe minimum energy needed by the reactants to form the products.The energy lost in the reaction
- 2. Multiple-choice1 minute1 ptAccording to collision theory, what must the reactants have in order to form products?The right sizeThe right shapeEnough energyNothing
- 3. Multiple-choice1 minute1 ptWhich factors increase the rate of a reaction.increasing temperatureincreasing concentrationincreasing surface areaall of these
- 4. Multiple-choice1 minute1 ptWhat kind of reaction is this?EndothermicExothermicCannot be determined
- 5. Multiple-choice30 seconds1 pt
How does a catalyst work in speeding up a reaction?
By lowering the activation energy or reaction
by giving them more energy
by making them more available
- 6. Multiple-choice30 seconds1 pt
What term is given to a reaction which transfers heat energy to the surroundings?
Endothermic
Reversible
Exothermic
Exotermic
- 7. Multiple-choice30 seconds1 pt
When barium hydroxide and ammonium chloride react, the temperature of the mixture decreases. What kind of reaction is this?
Endothermic
Decomposition
Exothermic
Indothermic
- 8. Multiple-choice30 seconds1 pt
When calcium reacts with water, the temperature changes from 18°C to 39°C. Which statement is correct?
The solution at the end is acidic
The reaction is reversible
The reaction is exothermic
The reaction is endothermic
- 9. Multiple-choice30 seconds1 ptWhat letter represents the energy of the products?ABCD
- 10. Multiple-choice30 seconds1 ptWhat type of reaction is this?EndothermicExothermic
