**The Normality of a Solution**

The normality of a solution is a measure of the concentration of the solute in the solution. It is defined as the number of gram equivalents of solute present per liter of solution. The normality of a solution is denoted by the symbol 'N'.

**Understanding the Given Solution**

In the given problem, we have a 10 ml solution labeled as '20 V'. The '20 V' indicates that the solution is prepared by dissolving a substance of known concentration in a specific volume of solvent. Here, 'V' stands for volume.

**Determining Normality**

To determine the normality of the solution, we need to know the concentration of the solute in gram equivalents per liter. However, the given solution does not provide this information directly. Therefore, we need to make some assumptions or calculations to determine the normality.

**Assumption: 20 V Solution**

Assuming that the '20 V' solution signifies that 20 grams of the solute is dissolved in 100 ml of solvent, we can calculate the concentration in gram equivalents per liter.

Step 1: Convert the given volume of solute (10 ml) to liters.
Volume in liters = 10 ml / 1000 ml (1 liter/1000 ml) = 0.01 liter

Step 2: Determine the concentration in gram equivalents per liter.
Concentration = (20 grams / 100 ml) × (1000 ml / 1 liter) = 200 gram equivalents per liter

**Result: Normality of the Solution**

Therefore, the normality of the 10 ml '20 V' solution is 200.

**Explanation Summary**

The normality of a solution is a measure of its concentration. In the given problem, the normality of a 10 ml '20 V' solution is calculated assuming that 20 grams of the solute is dissolved in 100 ml of solvent. By converting the given volume to liters and determining the concentration in gram equivalents per liter, we find that the normality of the solution is 200.