Why is it advised to add ethylene glycol to water in car radiator while driving in a hill station?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Function of a Car Radiator:**
- The car radiator is responsible for cooling the engine by circulating coolant (a mixture of water and antifreeze) to absorb heat from the engine and dissipate it to the atmosphere.

**Hint:** Think about how the radiator maintains the engine temperature during operation.

2. **Identifying the Problem in Hill Stations:**
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