| 1. | Which of the following character does not apply to water? |
| a. | The water molecule is asymmetric |
| b. | The water molecule readily forms hydrophobic interactions |
| c. | The covalent bonds in water are highly polarized |
| d. | All three atoms in the water molecule readily form hydrogen bonds |
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Answer: (b).The water molecule readily forms hydrophobic interactions
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| 2. | Weak acids generally have pKa |
| a. | 10^-14 Mvalues less than 1 |
| b. | 10^14 MpKa values greater than 2 |
| c. | 10^-7 Mbeen seldom found in living systems |
| d. | 10^7 Mthat cannot be used to buffer |
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Answer: 10^-14 MpKa values greater than 2
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| 3. | The reason that fats contain more energy than simple sugars, is fats have many more |
| a. | carbon atoms |
| b. | hydrogen atoms |
| c. | covalent bonds |
| d. | hydrogen bonds |
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Answer: (c).covalent bonds
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| 4. | The main difference between an acid and a base is that |
| a. | bases are polar molecules and acids are not |
| b. | acids are polar molecules and bases are not |
| c. | bases donate hydrogen ions in water while acids accept hydrogen ions |
| d. | acids donate hydrogen ions in water while bases accept hydrogen ions |
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Answer: (d).acids donate hydrogen ions in water while bases accept hydrogen ions
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| 5. | A solution with pH = 5 is __________ than a solution with pH = 7. |
| a. | 2 times more basic |
| b. | 10 times more basic |
| c. | 10 times more acidic |
| d. | 100 times more acidic |
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Answer: (d).100 times more acidic
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