Read the given statements and mark the correct option :
Statement 1 : Pieces of dry ice gradually get smaller when left at room temperature.
Statement 2 : Dry ice undergoes sublimation.

Options

A. Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
B. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
C. Statement 1 is true and statement 2 is false.
D. Both statements 1 and 2 are false.

Answer

To solve the question, we need to analyze both statements regarding dry ice:

**Step 1: Understand Statement 1**
- Statement 1 says: "Pieces of dry ice gradually get smaller when left at room temperature."
- Dry ice is the solid form of carbon dioxide (CO2). When dry ice is left at room temperature, it does not melt into a liquid; instead, it changes directly from solid to gas. This process is known as sublimation. As the dry ice sublimates, it loses mass and therefore the pieces become smaller over time.

**Step 2: Understand Statement 2**
- Statement 2 states: "Dry ice undergoes sublimation."
- Sublimation is the process where a solid turns directly into a gas without passing through the liquid phase. Since dry ice (solid CO2) does indeed undergo sublimation when exposed to room temperature, this statement is also true.

**Step 3: Evaluate the relationship between the statements**
- Statement 1 is true because dry ice does get smaller when left at room temperature due to sublimation.
- Statement 2 is true as well, as it correctly describes the process occurring with dry ice.

**Step 4: Conclusion**
- Both statements are true, and Statement 2 provides the correct explanation for Statement 1. Therefore, the correct option is that both statements are true, and Statement 2 is the correct explanation of Statement 1.

### Final Answer:
Both Statement 1 and Statement 2 are true, and Statement 2 is the correct explanation of Statement 1.

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