The change from solid sate to vapour state without passing through the liquid state is called………

Options

A. Fusion
B. Regulation
C. vaporation
D. sublimation

Explanation

To solve the question, we need to identify the term that describes the transition from a solid state directly to a vapor state without going through the liquid state. Here’s the step-by-step solution:

### Step 1: Understand the States of Matter
The three primary states of matter are solid, liquid, and gas (vapor). Each state has distinct characteristics.

### Step 2: Identify the Process of Transition
We are looking for a specific process that involves a solid changing directly into a vapor.

### Step 3: Review the Options
The options provided are:
- A) Fusion
- B) Regulation
- C) Vaporization
- D) Sublimation

### Step 4: Analyze Each Option
- **Fusion**: This is the process of melting, where a solid turns into a liquid.
- **Regulation**: This term does not relate to the states of matter.
- **Vaporization**: This generally refers to the transition from liquid to vapor, not solid to vapor.
- **Sublimation**: This is the process where a solid changes directly into a vapor without becoming a liquid.

### Step 5: Conclusion
Based on the definitions and processes, the correct answer is **D) Sublimation**.

### Final Answer
The change from solid state to vapor state without passing through the liquid state is called **sublimation**.

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