A process in which the system does not exchange heat with the surroundings is known as

Options

A. isothermal
B. adiabatic
C. thermal
D. isochoric

Explanation

To solve the question, we need to identify the correct term for a process where the system does not exchange heat with its surroundings. Let's analyze the options provided:

1. **Isothermal**: This refers to a process that occurs at a constant temperature. In an isothermal process, heat can be exchanged with the surroundings to maintain the temperature constant. Therefore, this is not the correct answer.

2. **Adiabatic**: This is the process we are looking for. In an adiabatic process, there is no heat exchange with the surroundings, meaning that the heat transfer (Q) is equal to zero (Q = 0). This is the correct term for the process described in the question.

3. **Isochoric**: This term describes a process in which the volume remains constant (ΔV = 0). While there may be heat exchange in an isochoric process, it does not relate to the heat exchange with the surroundings as specified in the question.

4. **Thermal**: This term is not a recognized thermodynamic process. It does not fit into the context of the question.

Based on the analysis of the options, the correct answer is **B. Adiabatic**.

### Step-by-Step Solution:
1. **Identify the terms**: Understand the definitions of the terms provided in the options.
2. **Analyze each option**:
- Isothermal: Constant temperature, heat exchange occurs.
- Adiabatic: No heat exchange with surroundings (Q = 0).
- Isochoric: Constant volume, heat exchange may occur.
- Thermal: Not a recognized thermodynamic process.
3. **Select the correct answer**: Based on the analysis, the process where no heat is exchanged with the surroundings is called **Adiabatic**.