9th Class Science Is Matter Around Us Pure Question Bank MCQs - Is Matter Around us Pure

A solution contains 50 g of common salt in 450 g of water. The concentration of the solution is

A) 500%

B) 50%

C) 10%

D) 80%

Correct Answer: C

Solution :

[c]

The concentration of solution

\[=\frac{Mass of solute}{Mass of solution}\times 100\]

Mass of common salt (solute) = 50 g

Mass of water = 450 g

Mass of solution = 50 + 450 = 500 g

Concentration of solution \[=\frac{50}{500}\times 100\]= 10%