(i) K kg mol-1 or K (molality)-1
(ii) mol kg K-1 or K-1(molality)
(iii) kg mol-1 K-1 or K-1(molality)-1
(iv) K mol kg-1 or K (molality)
Correct Answer: (i) K kg mol-1 or K (molality)-1
Explanation: The unit of ebulioscopic constant is K kg mol-1 or K (molality)-1