RRB Group-D Model Paper 17 with answers for online practice

Concept:

• Molarity:
• It is defined as the moles of a solute per litres of a solution.
• It is also known as the molar concentration of a solution.
• Molality:
• It is defined as the number of moles of solute per kilogram of solvent.
• Mole fraction:
• It is the ratio of moles of a component with the total moles of solute and solvent.
• Mass%:
• It is the percentage of the mass of solute or solvent w.r.t total mass of solution.

• Formulas:

Explanation:

• Molarity depends on the volume of the solution.
• And volume is directly proportional to temperature.
• And when we increase the temperature the volume will increase.
• So the increase in volume leads to a decrease in Molarity as Molarity is inversely proportional to the volume of solution.