Question 2
adding more solute to a solvent
a)decreases its boiling point
b)does not affect its boiling point
c)increases its boiling point
d)increases its freezing point

Adding more solute to a solvent increases its boiling point

Explanation:

Remember the colligative properties, in this case boiling Point Elevation.

Look at the formula

ΔTb = Kb · m

- where ΔTb  is the difference between T° eb of solvent in solution - T° eb of solvent pure

- Kb is the the molal boiling point constant

- m is molality (moles of solute / kg of solvent)

When you add more solute, you are increasing molality, so as Kb is constant and T° eb of solvent pure we also know it, you are always increasing ΔTb, that's why T° eb of solvent in solution is more higher.

b is the correct answer