In contact process for the manufacture of sulphuric acid, sulphur trioxide is dissolved in sulphuric acid in form oleum. Oleum moleculr formula is:
Correct answer: D. H2S2O7
- A. H2S2O3
- B. H2S2O5
- C. H2S2O6
- D. H2S2O7
Explanation
The correct answer is H2S2O7, which represents oleum. Oleum is formed when sulfur trioxide (SO3) is dissolved in sulfuric acid (H2SO4), resulting in the molecular formula H2S2O7. The other options are incorrect because they either represent non-existent or unrelated compounds.
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Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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