Which of the following statements is incorrect?

Options

A. Metals are malleable
B. All metal oxides are acidic in nature
C. Metals have lustre
D. Metal atoms have 1, 2 or 3 electrons in the outermost shell.

Explanation

To determine which statement is incorrect regarding metals and non-metals, let's analyze each option step by step.

### Step 1: Evaluate the First Statement
**Statement 1:** Metals are malleable; you can bend and shape them without breaking.

- **Analysis:** This statement is true. Metals are known for their malleability, which means they can be hammered or rolled into thin sheets without breaking.

### Step 2: Evaluate the Second Statement
**Statement 2:** All metal oxides are acidic in nature.

- **Analysis:** This statement is incorrect. Most metal oxides are actually basic in nature. When tested with litmus paper, metal oxides turn red litmus paper blue, indicating their basic nature. Therefore, this statement is false.

### Step 3: Evaluate the Third Statement
**Statement 3:** Metals have luster.

- **Analysis:** This statement is true. Metals are shiny and have a characteristic luster, which is one of their defining properties.

### Step 4: Evaluate the Fourth Statement
**Statement 4:** Metal atoms have 1, 2, or 3 electrons in their outermost shell.

- **Analysis:** This statement is also true. Metals typically have 1, 2, or 3 electrons in their outermost shell, which makes it easier for them to lose electrons and form positive ions.

### Conclusion
After evaluating all the statements, we find that:
- The first, third, and fourth statements are correct.
- The second statement is incorrect.

Thus, the **incorrect statement is Statement 2: "All metal oxides are acidic in nature."**

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