Question:

Hydrogen peroxide, in the pure state, is :

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H2O2 has an open-book (skew) structure, so it is non-planar; the pure liquid is almost colourless (pale blue only in thick layers).
Updated On: Nov 5, 2026
  • Linear and blue in color
  • Linear and almost colorless
  • Non-planar and almost colorless
  • Planar and bluein color
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The Correct Option is C

Solution and Explanation

\(\mathrm{H_2O_2}\) has the structure H-O-O-H with the two O-H bonds in different planes, like the pages of a half-open book (dihedral angle about 111.5 degrees in the gas phase). So it is non-planar and not linear.
Pure hydrogen peroxide is almost colourless (a pale blue liquid only in thick layers), not blue. Hence options (1), (2) (linear) and (4) (planar, blue) are wrong.
Answer: (3) Non-planar and almost colorless
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