Question

The formula for Ethane is

• A. CH$_4$
• B. CH$_3$CH$_3$
• C. CH$_3$CH$_2$CH$_2$CH$_3$
• D. CH$_3$(CH$_2$)$_4$CH$_3$

Hint:

Alkanes formula: C$_n$H$_{2n+2}$.
- Methane: CH$_4$ (n=1).
- Ethane: C$_2$H$_6$ (n=2).
- Propane: C$_3$H$_8$ (n=3).

Answer 1

The Correct Option is B

Step 1: Understanding the Question:
This question tests knowledge of chemical formulas of hydrocarbons.

Step 2: Detailed Explanation:
Ethane is a saturated hydrocarbon with 2 carbon atoms.
Its chemical formula is C$_2$H$_6$ or CH$_3$CH$_3$ (B).
Other options:
- CH$_4$ (A): Methane (1 carbon).
- CH$_3$CH$_2$CH$_2$CH$_3$ (C): Butane (4 carbons).
- CH$_3$(CH$_2$)$_4$CH$_3$ (D): Hexane (6 carbons).
Thus, ethane is CH$_3$CH$_3$.

Step 3: Final Answer:
Thus, the formula for ethane is CH$_3$CH$_3$, which corresponds to option (B).
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