Statement-`1`: Coolant coils are fitted at the top of a refrigerator , for formation of convection current.
Statement-`2`: Air becomes denser on cooling.

Options

A. Statement -`1` is True , Statement -`2` is True , Statement -`2` is correct explanation for Statement - `1`
B. Statement -`1` is True , Statement -`2` is True , Statement -`2` is not correct explanation for Statement - `1`
C. Statement -`1` is True , Statement -`2` is False.
D. Statement -`1` is False , Statement -`2` is True.

Answer

To analyze the statements provided, let's break down the reasoning step by step.

### Step 1: Understanding Statement 1
**Statement 1**: "Coolant coils are fitted at the top of a refrigerator, for formation of convection current."

- **Explanation**: In a refrigerator, coolant coils are indeed placed at the top. The purpose of these coils is to facilitate the movement of air through convection currents. When the coolant inside the coils absorbs heat from the interior of the refrigerator, it cools the air around it. This cooler air is denser and tends to sink, while the warmer air rises. This creates a circulation pattern, known as convection currents.

### Step 2: Understanding Statement 2
**Statement 2**: "Air becomes denser on cooling."

- **Explanation**: This statement is true. When air cools down, its molecules move closer together, which increases its density. Conversely, when air is heated, it expands and becomes less dense. This principle is crucial in understanding how convection currents work in the refrigerator. As the air cools around the coolant coils, it becomes denser and sinks, while the warmer air rises.

### Step 3: Analyzing the Relationship Between the Two Statements
- Statement 1 is correct because it describes the setup of the refrigerator and the role of coolant coils in creating convection currents.
- Statement 2 is also correct as it explains the behavior of air in relation to temperature changes, which is essential for the convection process described in Statement 1.

### Conclusion
Both statements are true, and Statement 2 serves as a correct explanation for Statement 1. The cooling of air leads to increased density, which is fundamental to the formation of convection currents in the refrigerator.

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