100 milli moles of a solute is present in  200 ml of the solution. Then its molarity is

A chemical species' concentration in a solution, specifically the amount of a solute per unit volume of solution, is measured by its molar concentration. The number of moles per litre is the most widely used molarity unit in chemistry and has the unit symbol mol/ $\mathrm{L}$ or $\mathrm{mol}/{\mathrm{dm}}^3$ in $\mathrm{Sl}$ unit.

 $$\begin{gathered} \mathrm{Molarity}=\frac{0.1}{0.2} \\ \Rightarrow \mathrm{Molarity}=\frac{1}{2}=0.5 \end{gathered}$$

So, the required answer is Option (D) 0.5M