Question

Milli-moles and moles of a solute in $2000mL$ solution which is $1M$ are respectively.

• A. 2 and 0.2
• B. 2 and 2000
• C. 2000 and 2
• D. $2\times {10}^3\mathrm{and}2\times {10}^{-3}$

Answer 1

The correct option is C 2000 and 2

We know that,
Molarity = $\frac{\text{Number of moles of solute}}{\text{Number of litres of solution}}$

$\Rightarrow$ Number of moles $=Molarity\times \left[Numberoflitresofsolution\right]$
= $1\times [2000\times$ ${10}^{-3}]$
= 2 moles

$\therefore$ Number of milli moles$=2\times {10}^3=2000$