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1. The most abundant element in Earth's crust is
A. sodiumB. oxygenC. siliconD. aluminumE.
2. A compound that can be decomposed to produce oxygen gas in the lab is
A. MnO2B. NaOHC. CO2D. KClO3E.
3. In the usual laboratory preparation equation for the reaction in question 2, what is the coefficient of O2?
A. 1B. 2C. 3D. 4E.
4. In the graphic representation of the energy contents of the reactants and the resulting products in an exothermic reaction, the energy content would be
A. higher for the reactantsB. higher for the productsC. the same for bothD. impossible to determineE.
5. The process of separating components of a mixture by making use of the difference in their boiling points is called
A. destructive distillationB. displacementC. fractional distillationD. filtrationE.
6. When oxygen combines with an element to form a compound, the resulting compound is called
A. a saltB. an oxideC. oxidationD. an oxalateE.
7. According to the activity chart of metals, which metal would react most vigorously in a dilute acid solution?
A. zincB. ironC. aluminumD. magnesiumE.
8. Graham's Law refers to
A. boiling points of gasesB. gaseous diffusionC. gas compression problemsD. volume changes of gases when the temperature changesE.
9. When 200 milliliters of a gas at constant pressure is heated, its volume
A. increasesB. decreasesC. remains unchangedD. E.
10. When 200 milliliters of a gas at constant pressure is heated from 0°C to 100°C, the volume must be multiplied by
A. 0/100B. 100/0C. 273/373D. 373/273E.
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