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Questions and Answers
What is the main source of the world's energy?
What is the main source of the world's energy?
- Solar energy
- Nuclear energy
- Wind energy
- Combustion of hydrocarbons (correct)
What are the examples of low melting solids mentioned in the text?
What are the examples of low melting solids mentioned in the text?
- Benzene and propane
- Hexane and polystyrene
- Methane and polyethylene
- Paraffin wax and naphthalene (correct)
What are hydrocarbons generally known for in terms of their color and interaction with water?
What are hydrocarbons generally known for in terms of their color and interaction with water?
- Colorful and hydrophilic
- Colorless and hydrophilic
- Colorful and hydrophobic
- Colorless and hydrophobic (correct)
What are the examples of hydrocarbons mentioned as gases in the text?
What are the examples of hydrocarbons mentioned as gases in the text?
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What does the text state as the dominant raw-material source for organic commodity chemicals such as solvents and polymers?
What does the text state as the dominant raw-material source for organic commodity chemicals such as solvents and polymers?
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Study Notes
Main Source of Energy
- The primary source of the world's energy is the Sun, as it provides solar energy necessary for photosynthesis and other processes.
Low Melting Solids
- Low melting solids include substances that have lower melting points, making them useful in various applications. Specific examples are not provided.
Hydrocarbons Characteristics
- Hydrocarbons are organic compounds comprised solely of hydrogen and carbon.
- They are typically colorless and do not mix well with water due to their hydrophobic nature.
Gaseous Hydrocarbons
- Common examples of gaseous hydrocarbons include methane, ethane, and propane. These compounds exist in a gaseous state at room temperature.
Raw-Material Source for Organic Chemicals
- Oil and natural gas serve as the dominant raw-material source for the production of various organic commodity chemicals like solvents and polymers.
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