MCQ
The solution of $A$ and $B$ are $0.1$ and $0.2$ molar in a substance. If $100\ \ce{ML}$ of $'A\ '$ are mixed with $25\ mL$ of $B$ and there is no change in volume, then the final molarity of solution is :
  • A
    $0.15M$
  • B
    $0.18M$
  • $0.12M$
  • D
    $0.30M$

Answer

Correct option: C.
$0.12M$
$\ce{M_1V_1 + M_2V_2 = M \times V}$
$0.1 \times 100 + 0.2 \times 25 = M \times 125$
$\Rightarrow\text{M}=\frac{10+5}{125}=\frac{15}{125}=0.12$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free