Concentrated nitric acid is labelled as 75% by mass – JEE Main PYQ

Concentrated Nitric Acid (75% by Mass)

Q. Concentrated nitric acid is labelled as 75% by mass. The volume in mL of the solution which contains 30 g of nitric acid is ______.

Given: Density of nitric acid solution = 1.25 g/mL
Step 1: 75% by mass means
75 g HNO₃ is present in 100 g of solution

Step 2: If 75 g HNO₃ → 100 g solution
Then 30 g HNO₃ → (100 / 75) × 30 = 40 g solution

Step 3: Use density formula
Density = Mass / Volume

Step 4: Volume of solution
= Mass / Density
= 40 / 1.25 = 32 mL
✔ Final Answer: 32

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Updated for JEE Main 2026: This PYQ is important for JEE Mains, JEE Advanced and other competitive exams. Practice more questions from this chapter.

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