Question

1. Metals _________

A. tend to be shiny solids and are good conductors of heat.

B. share properties of metals and nonmetals.

C. are often gases or brittle solids and are poor conductors of heat.

D. are poor conductors of electricity.

E. All of the above.

2. The most abundant element in the Earth’s hydrosphere is _____.

a. iron

b. oxygen

c. nitrogen

d. carbon

e. silicon

3. In the compound NaCl, the sodium atom donates ____ electron(s) to the chlorine atom so that the chlorine atom can have an octet.

A. one

B. two

C. three

D. four

E. None of the above.

4. In the compound CH3Cl, the C atom has an electronegativity of 2.5 while the Cl atom has an electronegativity of 2.9. Given this information, the differences in the electronegativity for the C and Cl atom will result in the C-Cl bond being nonpolar covalent.

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a. True

b. False

5. An automobile engine having a compression ratio of ____ means that the gasoline-air mixture was compressed to one-tenth of its original volume before it was ignited.

A. 2

B. 4

C. 8

D. 10

E. None of the above.

6. The net increase of CO2 in the hydrosphere is greater than the net increase of CO2 in the atmosphere.

A. True

B. False

7. Oil A has an iodine number ¼ that of Oil B. Select the appropriate conclusion for this finding.

a. Oil A is much more saturated than Oil B.

b. Oil B is much more unsaturated than Oil A.

c. Oil A is much more unsaturated than Oil B.

d. Oil A and Oil B are both equally saturated.

e. None of the above

8. Catalytic hydrogenation converts C-C _______bonds into C-C _______bonds.

a. single, double

b. single, triple

c. triple, triple

d. double, double

e. double, single

9. Suppose a balloon was inflated with nitrogen gas to a volume of 1.0 L at 20oC, then placed into a freezer kept at -80oC. Once it cooled to -80oC, the new volume of the balloon was ____ L.

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a. 0.55

b. 0.61

c. 0.66

d. 0.83

e. None of the above.

10. For all combustion reactions having the general formula,

CnH2n+2 + O2 àCO2 + H2O, the coefficient for carbon dioxide will always be an odd number.

A. True

B. False

Q1. Describe the difference between

a. a hypothesis and a theory and

b. an observation and an experiment.