Read the passage carefully and answer the Questions.

A homogeneous mixture of two or more than two components has uniform composition and properties. The binary solutions have two components, which may be solid, liquid or gas. The resultant solution has a larger amount of solvent and a smaller amount of solute. The amount of solute in a given amount of solvent decides the concentration of the resulting solution. The concentration can be expressed in various ways, like molarity, molality, normality and mole fraction.

Molarity of a solution containing 8 grams NaOH in one liter of water is

0.20 mol/L

The correct answer is Option (4) → 0.20 mol/L

Molarity = number of moles of solute / volume of solution in liters

Step 1: Find molar mass of NaOH

Na = 23, O = 16, H = 1

Molar mass = 23 + 16 + 1 = 40 g/mol

Step 2: Find number of moles of NaOH

Moles = given mass / molar mass

Moles = 8 g / 40 g/mol = 0.20 mol

Step 3: Volume of solution 1 liter

Step 4: Calculate molarity

Molarity = 0.20 mol/1 L = 0.20 mol/L

Therefore, the correct option is 0.20 mol/L.