The volume strength of a solution is a measure of the concentration of the solute in the solution. It is defined as the number of milliliters of pure solute present in 1000 milliliters of the solution. In the case of a 1 molar H2O2 solution, the volume strength can be calculated as follows:

1. Understanding molarity and volume strength:
- Molarity (M) is a unit of concentration that represents the number of moles of solute present in one liter of solution.
- Volume strength, on the other hand, is a unit of concentration that represents the volume of solute present in 1000 milliliters of solution.

2. Calculation of volume strength for 1 molar H2O2 solution:
- The molarity of a solution is defined as the number of moles of solute divided by the volume of the solution in liters.
- Since we have a 1 molar H2O2 solution, it means that there is 1 mole of H2O2 present in 1 liter of the solution.
- To calculate the volume strength, we need to convert the volume of the solution from liters to milliliters (since volume strength is measured in milliliters).
- There are 1000 milliliters in 1 liter, so the volume of the solution is 1000 milliliters.
- Therefore, the volume strength of a 1 molar H2O2 solution is 1000 milliliters.

3. The correct answer:
- The correct answer given is between '11.00,11.40', which is incorrect. The volume strength of a 1 molar H2O2 solution is 1000 milliliters, not between 11.00 and 11.40.

In conclusion, the volume strength of a 1 molar H2O2 solution is 1000 milliliters.