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H(2)O is liquid while H(2)S is a gas at ...

`H_(2)O` is liquid while `H_(2)S` is a gas at room temperature. Explain.

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H-O bond is more polar than H-S bond because of greater electronegativity difference in the bonding atoms. As a result, `H_(2)O` molecules are involved in the intermolecular hydrogen bonding and get associated to be liquid at room temperature. Since intermolecular hydrogen bonding is negligible in the molecules of `H_(2)S`, they donot get associated and remain in the gaseous state at room temperature. For more details, consult text part (Section 16).
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DINESH PUBLICATION-THE P-BLOCK ELEMENTS -Concept Based Questions
  1. SF(6) is a well known compound while SH(6) does not exist. Explain.

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  2. Oxygen does not show oxidation states of +4 " and " +6 like sulphur. E...

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  3. H(2)O is liquid while H(2)S is a gas at room temperature. Explain.

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  4. Sulphur dioxide is a more powerful reducing agent in the alkaline medi...

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  5. Bond angle in H(2)S is lower than in H(2)O. Justify.

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  6. Hydrogen sulphide cannot be dried by passing through conc. H(2)SO(4) ....

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  7. H(2)S is a stronger acid than H(2)O. Explain

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  8. Sulphur vapours exhibit some paramagnetic behaviour. Explain.

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  9. SF(6) is not easily hydrolysed whereas SF(4) can be. Assign reason.

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  10. Bond dissociation enthalpy of F-F bond is less than that of Cl-Cl bond...

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  11. Sulphur disappears when boiled with aqueous solution of sodium sulphit...

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  12. Chlorine water has both oxidising as well as bleaching properties ? Ex...

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  13. Oxygen molecule has the formula O(2) while sulphur is S(8). Why ?

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  14. Why is H(2)S less acidic than H(2)Te ?

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  15. Why does burning Mg continue to burn in a jar containing NO but burnin...

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  16. Reducing character decreases from SO(2) " to " TeO(2). Explain.

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  17. Why is iodine more soluble in KI solution than in water ?

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  18. Iodine is liberated in the reaction between KI and CU^(2+) ions but ch...

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  19. Lithium fluroide (LiF) is mainly ionic but lithium iodide (LiI) is cov...

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  20. Interhalogen compounds are more reactive than halogens. Why ?

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