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Q.

The strength 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)

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a

1.7 and 0.25

b

0.85 and 0.5

c

0.85 and 0.25

d

1.7 and 0.5

answer is D.

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Detailed Solution

Volume strength = 11.2 × molarity  

molarity = 5.6/11.2 = 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. 

 mass% = 17/1000  = 1.7

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