InterviewSolution
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InterviewSolution
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Answer any five of the following questions. a) Given reason: (i) Hydrogen bonding in H_2 O but not in H_2 S (ii) Conc. H_2 SO_4 is a good dehydrating agent |
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Answer» Solution :(a) (i) Since oxygen is more electronegative and has small size. (ii) DUE to strong affinity for water/it removes elements of water in the form of `H_2O` (b)  Detailed Answer: (a) (i) (A) In water, the oxygen atom is highly electronegative and can polarize (partially) the hydrogen ATOMS, thus hydrogen-hydrogen bonds between the `H_2O` molecules results in the creation of a stable intermolecular network and the very high boiling point of water and ALCOHOLS. In `H_2S` those bonds don.t exist, because sulphur is much less electronegative. (B) Another reason may be that O uses `sp^(3)` orbitals, and thus alone may be able to form stable hydrogen bonds. By comparison S use p orbitals, which may not be able to form stable hydrogen bonds. (Any other correct justification) (ii) Because it has a strong affinity for water and thus it absorbs water quickly. (b) In sulphurous acid, one atom of sulphur is bonded to two hydroxyl GROUPS and one oxygen atom forms `a pi` bond with the sulphur atom. |
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