Which of the following is the formula for acetylene?Select answer from the options belowC2H8None of the choices are correct.C2H4C2H2

Break Down the Problem

1. Identify what acetylene is and its molecular formula.
2. Compare the provided options to find the correct formula.

Relevant Concepts

• Acetylene is a well-known hydrocarbon and is an example of an alkyne.
• The general formula for an alkyne with two carbon atoms is $C_nH_{2n-2}$.

Analysis and Detail

1. According to the general formula $C_nH_{2n-2}$, for $n = 2$: $H = 2(2) - 2 = 2$ Thus, the molecular formula for acetylene should be $C_2H_2$.

2. Now let's examine the provided options:

   • C2H8: This formula does not match, as it suggests a saturated molecule with too many hydrogens for an alkyne.
   • None of the choices are correct: This is incorrect since $C_2H_2$ is a valid formula.
   • C2H4: This represents ethylene, which is an alkene, not an alkyne.
   • C2H2: This is the correct molecular formula for acetylene.

Verify and Summarize

After analyzing all options, the only valid formula that corresponds to acetylene is $C_2H_2$.

Final Answer

The formula for acetylene is $\text{C}_2\text{H}_2$.