Question 19

The concentration diminishes.

When a solution is diluted with water, the amount of solute per unit volume decreases, leading to a reduction in concentration.

A) strengthen

This option is incorrect because diluting a solution with water does not increase the concentration of solute; rather, it decreases it. Strengthening would imply an increase in concentration, which contradicts the process of dilution.

B) propel

The term "propel" does not relate to the concept of concentration in a solution. It suggests movement or force, which is irrelevant in the context of dilution and concentration changes.

C) waver

While "waver" might imply fluctuation, it does not accurately describe the effect of dilution on concentration. Dilution leads to a clear decrease in concentration, rather than an undefined or fluctuating state.

D) diminish

This option is correct because diluting a solution with water directly results in a lower concentration of solute. The process of adding water increases the total volume while keeping the amount of solute constant, thus diminishing the concentration.

Conclusion

Diminishing concentration is the definitive outcome of diluting a solution with water. Options A, B, and C fail to accurately describe this process, while D correctly represents the fundamental principle of dilution, clearly indicating that the concentration decreases.