Which of the following statements `is//are` wrong?

Options

A. `C_(n)H_(2n)` is the general formula of alkanes.
B. In homologous series, all member have the same physical properties.
C. `IUPAC` means International Union of Physics and Chemistry.
D. Butane contains two `1^(@)C` atoms and two `2^(@)C` atoms.

Explanation

To determine which statements are wrong, we will analyze each statement one by one.

### Step 1: Analyze the first statement
**Statement:** CnH2n is the general formula of Alkanes.

- **Analysis:** The general formula for alkanes is actually CnH2n+2, not CnH2n. For example, if we take n=1, we get CH4 (methane), which fits the formula CnH2n+2. Therefore, this statement is **wrong**.

### Step 2: Analyze the second statement
**Statement:** In a homologous series, all members have the same physical properties.

- **Analysis:** In a homologous series, while the members have similar chemical properties due to the same functional group, their physical properties (like melting point and boiling point) can differ significantly. For example, methane (CH4) and ethane (C2H6) have different boiling points. Thus, this statement is also **wrong**.

### Step 3: Analyze the third statement
**Statement:** IUPAC means International Union of Physics and Chemistry.

- **Analysis:** The correct full form of IUPAC is the International Union of Pure and Applied Chemistry. It does not include physics in its name. Therefore, this statement is **wrong**.

### Step 4: Analyze the fourth statement
**Statement:** Butane contains two 1-degree carbons and two 2-degree carbon atoms.

- **Analysis:** In butane (C4H10), the structure can be drawn as follows:
```
H H H
| | |
H - C - C - C - C - H
| |
H H
```
In this structure, the terminal carbons (C1 and C4) are 1-degree (attached to one other carbon), and the two middle carbons (C2 and C3) are 2-degree (attached to two other carbons). Therefore, this statement is **correct**.

### Conclusion
The statements that are wrong are:
1. CnH2n is the general formula of Alkanes.
2. In a homologous series, all members have the same physical properties.
3. IUPAC means International Union of Physics and Chemistry.

### Final Answer
The wrong statements are the first, second, and third statements.

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