A) Normality
B) Molarity
C) Molality
D) Formality
Correct Answer: C
Solution :
Molality does not depend upon temperature as it does not contain volume term but contain mass. Molality is defined as number of g-mole of solute present in 1 kg of solvent. \[m=\frac{g-mole\,of\,solute}{mass\,of\,solvent\,(kg)}\] Normality is defined as number of g-equivalents of solute present in 1 L of solution. \[N=\frac{no.\,ofg-eq}{V(L)}\] Molarity is defined as number of moles of solute present in 1 L of its solution. \[M=\frac{number\,of\,g-mole}{V(L)}\] Formality is defined as number of gram formula masses (moles) of an ionic solute present in 1 litre of solution. \[F=\frac{no.\,of\,gram\,formula\,mass\,of\,solute}{vol.\,of\,solution\,(L)}\]
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