Question

A solution of urea (mol. mass 56 g mol⁻¹) boils at 100.18°C at the atmospheric pressure. If $K_f$ and $K_b$ for water are 1.86 and 0.512 K kg mol⁻¹ respectively, the above solution will freeze at
(a) 0.654°C
(b) - 0.654°C
(c) 6.54°C
(d) - 6.54°C

Answer 1

option d is the answer for the question