Answer: dilute
Explanation:
A concentrated solution which is used to prepare solutions of lower concentrations by diluting it with addition of water.
A dilute solution is one which contains lower concentration.
Using Molarity equation:
[tex]M_1[/tex] =concentration of stock solution = 0.150 mol/L
[tex]V_1[/tex] = volume of stock solution = 10.0 ml
[tex]M_2[/tex] = concentration of dilute solution = ?
[tex]V_2[/tex] = volume of dilute solution = (10.0+90.0) ml = 100.0 ml
[tex]0.150\times 10.0=M_2\times 100.0[/tex]
[tex]M_2=0.015mol/L[/tex]
As the concentration is less than the original concentration, the solution is termed as dilute.