The unit of ebullioscopic constant is ?
Question 10 The unit of ebuilioscopic constant is (a) K kg mol−1 or K (molality)−1 (b) mol kg K−1 or K−1 (molality) (c) kg mol−1 or K−1 (molality)−1 (d) K mol kg−1 or (molality)
Pure benzene freezes at 5.45°C at a certain places but a 0.374 m solution of tetrachloroethane In benzene freezes at 3.55°C. The Kf for benzene is