The molecular weight of non-volatile solute can be determined experimentally by osmotic pressure method or by cryoscopy or by ebullisocopy Berkeley-Hartley method for isotomic presure is commonly used for aqueous solutions. Elevation in `b.pt.` or depression in `f.pt.` on addition of non-valatile solute in a solvent is read by Beckmann's thermometer.
Which of the following statement is wrong :

Options

A. Super heating or super cooling must be avoided during cryoscopy or equllioscopy measurements.
B. Addition of salt on ice brings it's early melting.
C. Water boils at relatively higher temperature in pressure cooker.
D. Beckman's thermometers are used to determine exact `b.pt.` ot `f.pt.` of solvent and solutions respectively.

Answer

D

Explanation

Beckmann's thermometers give `b.pt.` or `f.pt.` on their scale.