C-100 Practice Multiple Choice Question Set 2
| 1. When the following
reaction equation is properly balanced, the number of moles of O2
will be...
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| (a) | 1.5 moles | |
| (b) | 3.5 moles | |
| (c) | 3 moles | |
| (d) | 5 moles | |
| 2. When the following
reaction equation is properly balanced, the number of moles of O2
will be...
|
||
| (a) | 1.5 moles | |
| (b) | 13 moles | |
| (c) | 19 moles | |
| (d) | 38 moles | |
| 3. How many moles of CO2 are present in 220 mg? | ||
| (a) | 5 moles | |
| (b) | 0.005 mole | |
| (c) | 5000 moles | |
| (d) | 10 moles | |
| 4. If the temperature of a reaction is increased by 20oC, the reaction rate will be... | ||
| (a) | 2 times as fast. | |
| (b) | 4 times as fast. | |
| (c) | 20 times as fast. | |
| (d) | unchanged because the reaction rate is not dependent on the temperature. | |
| 5. One mole of (NH4)2HPO4 contains _?_ moles of hydrogen atoms. | ||
| (a) | 1 | |
| (b) | 5 | |
| (c) | 6 | |
| (d) | 9 | |
| 6. Which of the following compounds should have the highest boiling point? | ||
| (a) | NH3 | |
| (b) | CH4 | |
| (c) | H2O | |
| (d) | HF | |
| 7. The following
reaction coordinate diagram represents...
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| (a) | an endothermic reaction. | |
| (b) | an exothermic reaction. | |
| (c) | a reaction that is neither endothermic nor exothermic. | |
| (d) | a reaction in which a catalyst is used. | |
| 8. If the concentration of a reactant is tripled, the reaction rate will... | ||
| (a) | be at least 3 times as fast. | |
| (b) | be 4 times as fast. | |
| (c) | be 30 times as fast. | |
| (d) | remain the same because the reaction rate does not depend on the concentration of the reactants. | |
| 9. The half-life of francium-212 is 19 minutes. How many minutes will it take for 1 gram of this isotope to decay to 0.125 grams? | ||
| (a) | 4.75 minutes | |
| (b) | 9.5 minutes | |
| (c) | 38 minutes | |
| (d) | 57 minutes | |
| 10. The atom formed by the beta decay of carbon-14 is... | ||
| (a) | oxygen-18 | |
| (b) | beryllium-10 | |
| (c) | boron-14 | |
| (d) | nitrogen-14 | |
| 11. How many calories are needed to raise the temperature of 10 grams of water from -5oC to 15oC? Assume that the water is cooled below the freezing point but has not frozen. | ||
| (a) | 200 calories | |
| (b) | 100 calories | |
| (c) | 2 calories | |
| (d) | 0.5 calories | |
| 12. In a single replacement reaction, why will one metal replace another metal in an ionic compound? | ||
| (a) | The metal will replace another metal if it has a smaller mass and thus is able to hit the ionic compound with a higher velocity and thus more energy. | |
| (b) | The metal will replace another metal if it has a larger mass and thus is able to hit the ionic compound with more energy. | |
| (c) | The metal will replace another metal if it can gain electrons more readily than the other metal. | |
| (d) | The metal will replace another metal if it can lose electrons more readily than the other metal. | |
| 13. When two ionic compounds are dissolved in water, a double replacement reaction can... | ||
| (a) | never occur since all ions in water are "spectator ions". | |
| (b) | occur if two of the ions form an insoluble ionic compound, which precipitates out of solution. | |
| (c) | occur if the ions react to form a gas, which bubbles out of the solution. | |
| (d) | occur only if the ions form covalent bonds with each other. | |
| 14. Which of the following correctly represents the balanced chemical reaction between aluminum and sulfur? | ||
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| 15. An equilibrium constant of 10-4 for a reaction means that the reaction is... | ||
| (a) | one that will have 50% product and 50% reactant at equilibrium. | |
| (b) | one that is very favorable and will have mostly product at equilibrium. | |
| (c) | one that is unfavorable and will not have very much product at equilibrium. | |
| (d) | The equilibrium constant only relates to the speed of a reaction and not to the amount of product formed. | |
| 16. Which of the following equations represents the equilibrium equation for the following reaction? | ||
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| 17. If additional calcium phosphate is added to the above reaction mixture, what will happen to the overall reaction? | ||
| (a) | There will be no change in the overall reaction. | |
| (b) | The reaction will occur at a faster rate. | |
| (c) | Less of the reactants will react in order to compensate for the increase in the amount of one of the products of the reaction. | |
| (d) | More of the reactants will have to react in order to compensate for the increase in the amount of one of the products of the reaction. | |
Copyright © August 2000 by Richard C. Banks...all rights reserved.
