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

`H_(2)S` is a stronger acid than `H_(2)O`. Explain

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The S-H bond is weaker than O-H bond because the size of S atom is bigger than that of O atom. Hence, `H_(2)S` can dissociate to give `H^(+)` ions more easily than `H_(2)O`. In other words, `H_(2)S` is a stronger acid than `H_(2)O`. In fact, dissociation constant of `H_(2)O` is so small that for all practical purposes, `H_(2)O` is considered to be neutral.
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(a) Draw the structures of the following molecules : (i) N_(2)O_(5) (ii) HCIO_(4) (b) Explain the following observations : (i) H_(2)S is more acidic than H_(2)O . Fluorine does not exhibit any positive oxidation state . (iii) Helium forms no real chemical compound.

PRADEEP-P-BLOCK ELEMENTS -CONCEPTUAL QUESTION
  1. SF(6) is known but SC(6) is not. Why?

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  2. H(2)S acts only as a reducing agent while SO(2) acts as an oxidising a...

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

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  4. Give reasons for the following observations : Why SF(4) undergoes hy...

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  5. All the bonds in SF(4) are not equivalent. Why ?

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  6. Sulphur hexafluoride is used as a gaseous electrical insulator.

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  7. (a) Suggest a quantitative method for estimation of a gas which protec...

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  8. Sulphur disappears when boiled with an aqueous solution of sodium sulp...

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  9. Draw the structure of : SO(3)^(2-)

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  10. Give a chemical reaction in the support of the observation that sulphu...

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  11. Electron gain enthalpies of halogens are largely negative. Explain.

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  12. The negative value of electron gain enthalpy is less for fluorine than...

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  13. F2 has lower bond dissociation enthalpy than Cl2. Why?

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  14. I(2) is more soluble in KI than in water. Why ?

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  15. Why fluorine does not exhibit any positive oxidation state?

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  16. Fluoride ion has higher hydration enthalpy than chloride ion. Give rea...

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  17. Among halogens, F(2) is the strongest oxidising agent. Or F(2) is a ...

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  18. F(2) is a stronger oxidising agent than Cl(2)

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  19. Addition of Cl(2) to KI solution gives it a brown colour but excess of...

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  20. Give chemical reaction in support of the observation that iodide ions ...

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