AP EAMCET Engineering 2012 Solved Paper

BaCl2 being ionic in nature, ionises completely to give Ba2+ and 2Cl−(1+2=3) ions, i.e., number of particles increases in the solution.
∴ i=

3

1

=3=

Mc

Mo

(where, Mc= calculated molar mass and Mo= observed molar mass )
3=

Mc

Mo

or Mo=

Mc

3

i.e.,Mo<Mc
or observed molecular mass of BaCl2 is less than the calculated molecular mass.