Assertion (A): Ethylene glycol is used as antifreeze in the radiator of car

Reason (R): Addition of Ethylene glycol lowers its freezing point      

Ethylene glycol is commonly used as an antifreeze in the radiator of cars because it has a lower freezing point than water. When mixed with water, it lowers the freezing point of the solution, making it less likely to freeze in cold weather conditions. This is important because if the liquid in the radiator were to freeze, it would expand and potentially damage the engine. Therefore, the addition of ethylene glycol does indeed lower the freezing point of the solution, which is why it is effective as an antifreeze in the radiator of a car.