Question

1 mL of 30 % (w/V) $H_2O_2$ solution at STP gives 100 mL of oxygen gas. The volume strength of $H_2O_2$ (in V) is:

• A. 30
• B. 100
• C. 10
• D. 20

Hint:

"Volume strength" is literally the number of volumes of $O_2$ released per unit volume of solution.

Answer 1

The Correct Option is B

Step 1: Understand volume strength.
The volume strength of a hydrogen peroxide solution is the volume of oxygen gas, measured at STP, that one part of the solution releases when it fully breaks down.

Step 2: Recall the decomposition.
Hydrogen peroxide breaks down as $2H_2O_2 \rightarrow 2H_2O + O_2$, giving off oxygen gas. The amount of this gas tells us the strength.

Step 3: Read the data.
We are told that 1 mL of the given solution produces 100 mL of oxygen gas at STP.

Step 4: Match it to the definition.
The phrase volume strength asks how many mL of oxygen come from 1 mL of solution. Here that number is exactly 100.

Step 5: No extra calculation needed.
Because the data already states the oxygen volume per 1 mL, the volume strength is read directly as 100 V. The 30 percent figure is extra information for this reading.

Step 6: State the answer.
The volume strength of the solution is 100 V.
\[ \boxed{100} \]