Gujarat BoardEnglish MediumSTD 12 ScienceChemistrySolutions1 Mark
Question
Define the following term: Mole fraction.
✓
Answer
Mole fraction: The mole fraction of a component in a mixture is defined as the ratio of the number of moles of the component to the total number of moles of all the components in the mixture. i.e., $\text{Mole fraction of a component}=\frac{\text{Number of moles of the component}}{\text{Total number of moles of all components}}$ Mole fraction is denoted by ‘x’. If in a binary solution, the number of moles of the solute and the solvent are nA and nB respectively, then the mole fraction of the solute in the solution is given by, $\text{x}_\text{A}=\frac{\text{n}_\text{A}}{\text{n}_\text{A}+\text{ n}_\text{B}}$ Similarly, the mole fraction of the solvent in the solution is given as: $\text{x}_\text{B}=\frac{\text{n}_\text{B}}{\text{n}_\text{A}+\text{ n}_\text{B}}$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.