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)	Molality	Molarity	Mass fraction	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 $=\frac{\text{ Mass of component }}{\text{ Mass of solution }}=Z$