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| 1 | |
Which of the following has the highest boiling point? |
| | A) | MgO |
| | B) | Li |
| | C) | H2 |
| | D) | H2O |
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| 2 | |
Which of the following has the highest melting point? |
| | A) | Li |
| | B) | MgO |
| | C) | Cl2 |
| | D) | H2O |
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| 3 | |
Which of the following is true? |
| | A) | Covalent network solids have very low boiling points and are insoluble in most liquids. |
| | B) | Metallic crystalline solids are formed by metals with low electronegativities. |
| | C) | Ionic crystalline solids have low electrical conductivity in liquid state. |
| | D) | Molecular crystalline solids have high electrical conductivity in liquid state. |
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| 4 | |
Which of the following is not true? |
| | A) | Non-polar molecular crystals are very soft and are soluble in non-polar solvents. |
| | B) | Non-polar molecular crystals are formed from symmetrical molecules with covalent bonds between atoms with small electronegativity differences. |
| | C) | Non-polar molecular crystals generally have low boiling points. |
| | D) | Non-polar molecular crystals generally have high boiling points. |
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| 5 | |
An ionic crystalline solid forms between atoms with an electronegativity difference |
| | A) | less than 1.7 |
| | B) | between 0.5 and 1.7 |
| | C) | greater than 1.7 |
| | D) | less than 0.5 |
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| 6 | |
Which of the following does not explain the malleability of metal solids? |
| | A) | When stress is applied one layer can slide over another while the free electrons continue to bind the ions together. |
| | B) | Metallic bonds are non-directional. |
| | C) | When stress is applied, like charges become aligned and repel each other. |
| | D) | Positive metal cations are layered as fixed arrays which can slide over one another. |
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| 7 | |
Which of the following substances is a good conductor in solid state? |
| | A) | P4 |
| | B) | Zn |
| | C) | CO |
| | D) | NaCl |
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| 8 | |
Which of the following is a good conductor when dissolved in water? |
| | A) | KCl |
| | B) | Br2 |
| | C) | CO |
| | D) | CH3COOH |
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| 9 | |
Which of the following properties would indicate that a solid is ionic? |
| | A) | low boiling point, low electrical conductivity, non-polar |
| | B) | high boiling point, high electrical conductivity, hard and brittle |
| | C) | high boiling point, very high electrical conductivity, have a luster |
| | D) | high boiling point, low electrical conductivity, hard crystals |
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| 10 | |
Which of the following are general properties of a molecular solid? |
| | A) | low boiling points and electrical conductivity, soluble in non-polar solvents |
| | B) | low boiling points, brittle, often soluble in water |
| | C) | high boiling points, hard crystals, insoluble in most liquids |
| | D) | high boiling points, hard and brittle, often soluble in water |
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