MEDIUMMCQ SINGLEJEE Mains ChemistryPhysical ChemistrySolutionsDepression in freezing point
The amount of urea to be dissolved in 500 cc of water (K = 1.86) to produce a depression of 0.186ºC in the freezing point is
A.0.3 gm
B.3 gm✓ Correct
C.6 gm
D.9 gm.
Explanation
Mass of solute 1000 f f m T w K x x x Given Molecular weight of urea = 60 g/mol o f 1 f ΔT =0.186 C K =1.86K kg mol w =500cc On substituting SOLUTIONS 45 60 0.186 500 3 1000 1.86 g x x x
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