JEE Main 2011 Chemistry question
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°C will be : [ for water = 1.86 K kg , and molar mass of ethylene glycol = 62 g )
Answer: (4)
Solution
mol/kg. For 4 kg: 12.9 mol × 62 = 800 g, i.e. about 804 g, option (4).