Which of the following hydrocarbons is a gas at room temperature?

Which of the following hydrocarbons is a gas at room temperature?

Step 1: Understand what hydrocarbons are. Hydrocarbons are compounds made of hydrogen and carbon.
Step 2: Know that hydrocarbons can be in different states: gas, liquid, or solid, depending on their structure and temperature.
Step 3: Identify the hydrocarbons given in the question. For this example, we will consider methane (CH4) and others like ethane (C2H6), propane (C3H8), and butane (C4H10).
Step 4: Check the state of each hydrocarbon at room temperature (about 20-25 degrees Celsius).
Step 5: Recognize that methane (CH4) is a small hydrocarbon and is a gas at room temperature.
Step 6: Note that larger hydrocarbons like ethane, propane, and butane are liquids at room temperature.
Step 7: Conclude that methane (CH4) is the only gas among the hydrocarbons listed.

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