Moderate

Atomic hydrogen reacts with oxygen to give:

Correct answer: B. Almost pure hydrogen peroxide

  • A. Almost pure water
  • B. Almost pure hydrogen peroxide
  • C. A mixture of water and hydrogen peroxide
  • D. None of these

Explanation

Atomic hydrogen reacts with O₂ stepwise (H· → HO₂· → H₂O₂), and this pathway strongly favors hydrogen peroxide formation. Water forms only in minor amounts, so the product is almost pure H₂O₂.

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About s-Block and p-Block Elements

The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.

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