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| 1 | |
Which of the following is a characteristic of hydrocarbons? |
| | A) | They tend to be insoluble in polar solvents such as water. |
| | B) | They tend to be soluble in non-polar solvents such as benzene. |
| | C) | Their melting and boiling points increase as the number of carbon atoms increase. |
| | D) | All of the above. |
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| 2 | |
Which of the following statements is correct? |
| | A) | An alkene is more reactive than an alkane, which is more reactive than an alkyne. |
| | B) | An alkyne is more reactive than an alkane, which is more reactive than an alkene. |
| | C) | An alkane is more reactive than an alkene, which is more reactive than an alkyne. |
| | D) | An alkyne is more reactive than an alkene, which is more reactive than an alkane. |
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| 3 | |
Benzene is a molecule |
| | A) | with alternating double and triple bonds |
| | B) | which is highly reactive because of its many double bonds |
| | C) | which has delocalised electrons that make it very stable |
| | D) | which is saturated in hydrogen |
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| 4 | |
Which reaction type is not observed with alkanes? |
| | A) | Addition |
| | B) | Combustion |
| | C) | Oxidation |
| | D) | Substitution |
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| 5 | |
What are the coefficients for O2, CO2 and H2O respectively in the balanced chemical equation for the complete combustion of 1 mole of pentane (C5H12)? |
| | A) | 11,5,6 |
| | B) | 8,5,6 |
| | C) | 16,5,6 |
| | D) | 11/2,5,6 |
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| 6 | |
The possible products of the incomplete combustion of an alkane are... |
| | A) | H2O and CO2 |
| | B) | H2O, O2 and CO |
| | C) | C, CO and CO2 |
| | D) | C, CO, CO2 and H2O |
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| 7 | |
Classify the following reaction.
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| | A) | Addition |
| | B) | Substitution |
| | C) | Elimination |
| | D) | Combustion |
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| 8 | |
Classify the following reaction.
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| | A) | Addition |
| | B) | Substitution |
| | C) | Elimination |
| | D) | Combustion |
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| 9 | |
Refining petroleum by the process of fractional distillation relies on |
| | A) | the chemical property of combustibility |
| | B) | the physical property of density |
| | C) | the physical property of boiling point |
| | D) | the physical property of solubility |
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| 10 | |
Which of the following is a possible product of the cracking of pentane? |
| | A) | Hexane |
| | B) | Water |
| | C) | Ethene |
| | D) | Octane |
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