Which of the following hydrides has the lowest boiling point?
Correct answer: B. H2S
- A. H2O
- B. H2S
- C. H2Se
- D. H2Te
Explanation
Boiling points depend on intermolecular forces. H₂O has strong hydrogen bonding, giving it the highest boiling point. H₂S, H₂Se, and H₂Te have only van der Waals forces, which increase with molecular mass. Since H₂S is the lightest and has the weakest van der Waals forces, it has the lowest boiling point.
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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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