Ethylene glycol is used as an antifreeze in a cold climate. Mass of ethylene glycol which should be added to 4 kg of water to prevent it from freezing at $-6^{\circ} C$ will be : <br> [$K_f$ for water = 1.86 $K \; kg\; mol^{-1}$, and molar mass of ethylene glycol = 62 $g\; mol^{-1}$ )
