Verified Solution • 2025–26 Session moderate

QJEEM20Ch08ea: JEE Main 2020 Chemistry - Class 11 JEEM20Ch08ea Solution: The strengths of 5.6 volume hydrogen peroxide (of density 1…

The strengths of 5.6 volume hydrogen peroxide (of density 1 g/mL) in terms of mass percentage and molarity (M), respectively, are: (Take molar mass of hydrogen peroxide as 34 g/mol)

Multiple Choice Options

  • A 0.85 and 0.5
  • B 0.85 and 0.25
  • C 1.7 and 0.25
  • D 1.7 and 0.5

Step-by-Step Verified Solution

Volume strength = 11.2 × molarity

⇒\Rightarrow molarity = 5.611.2{{5.6} \over {11.2}} = 0.5

Assuming 1 litre solution,

mass of solution = 1000 ml × 1 g/ml = 1000 g

mass of solute = moles × molar mass

= 0.5 mol × 34 g/mol

= 17 gm.

∴\therefore mass % =
mass of solute
mass of solution
 ×\times 100

= 171000×100{{17} \over {1000}} \times 100 = 1.7 %

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