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JEE Main 20203 SeptemberEvening Shift
Exam
JEE Main
Year
2020
Date
3 September
Shift
Evening Shift
Subject
Chemistry
Chapter
Some Basic Concepts of Chemistry

JEE Main 2020 · 3 September · Evening Shift · Chemistry · Some Basic Concepts of Chemistry

The strengths of 5 . 6 volume hydrogen peroxide (of density 1g / mL...

The strengths of 5.65 . 6 volume hydrogen peroxide (of density 1g/mL1g / mL ) in terms of mass percentage and molarity(M)\left(M\right) respectively, are: (Take molar mass of hydrogen peroxide as 34g/mol34g / mol)

Options

  1. A1.7 and 0.5
  2. B0.85 and 0.25
  3. C1.7 and 0.25
  4. D0.85 and 0.5

Correct answer

A. 1.7 and 0.5

Step-by-step solution

For H2O2{H}_{2}{O}_{2}

Molarity =Volumestrength11.2=5.611.2=0.5M= \dfrac{Volumestrength}{11 . 2} = \dfrac{5 . 6}{11 . 2} = 0 . 5M

Molarity \dfrac{% \left(w / w\right) \times 10 \times d}{GMM}

0 . 5 = \dfrac{% \left(w / w\right) \times 10 \times 1}{34}

% \left(w / w\right) = \dfrac{0 . 5 \times 34}{10} = 1 . 7

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