Lead storage battery contains 38% by weight — JEE Mains Chemistry Past Papers Chemistry Question

💡 Solution & Explanation

Tf = imax  Kf  molality Consider 100 g solution W(H2SO4 ) = 38 gm W (Water) = 62 g Molality = 98 38   = 6.254 Tƒ = i  Kf  molality = 2.67  1.8  6.254 = 30ºC Freezing point of liquid in battery is –30°C The temperature in Kelvin at which the solution in the battery will freeze is = 273 + (–30ºC) = 273 – 30ºC = 243 K