Question

Express the terms representing the following formulae.
$\left(i\right) \frac{\text{No. of moles of solute }}{\text{Volume of solution in litres }} = \left(W\right)$
$\left(ii\right) \frac{\text{ No. of moles of solute}}{\text{Mass of solvent in kg }} = \left(X\right)$
$\left(iii\right) \frac{\text{ No. of moles of component}}{\text{Moles in the solution }} = \left(Y\right)$
$\left(iv\right) \frac{\text{ Mass of component}}{\text{ Mass of solution}} = \left(Z\right)$

	W	X	Y	Z
(a)$\quad$	Molality$\quad$	Molarity$\quad$	Mass fraction$\quad$	Mole fraction
(b)	Molarity	Molality	Mass fraction	Mole fraction
(c)	Molarity	Molality	Mole fraction	Mass fraction
(d)	Molality	Molarity	Mole fraction	Mass fraction

• A. a
• B. b
• C. c
• D. d

Answer 1

Answer: (C)

Molarity $=\frac{\text { no. of moles of solute }}{\text { Volume of solution }( L )}= W$
Molality $=\frac{\text { no. of moles of solute }}{\text { Mass of solvent }( kg )}=X$
Molefraction $=\frac{\text { no. of moles of component }}{\text { Total no. of moles in solution }}= Y$
Molarity $=\frac{\text { Mass of component }}{\text { Mass of solution }}= Z$