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Why is Bi(V) a stronger oxidant than Sb(...

Why is Bi(V) a stronger oxidant than Sb(V) ?

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As we go down the group, +3 oxidation state is more stable than +5 oxidation state due to inert pair effect. Bi(V) will take up two electrons to change into Bi(III) and thus behave as an oxidant. In the case of Sb(V), conversion from +5 state to +3 will not occur readily.
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(a) Account for the following observations : (i) SF_(1) is easily hydrolysed whereas SF_(6) is not easily hydrolysed. (ii) Chlorine water is a powerful bleaching agent. (iii) Bi (V) is a stronger oxidising agent than Sb(V) (b) What happens when : (i) White phosphorus is heated with concentrated NaOH solution in an inert atmosphere of CO_(2). (ii) XeF_(6) undergoes partial hydrolysis. (Give the chemical equations involved).

(a) Draw the structures of the following : (i) PCl_(5) (s) (ii) SO_(3)^(2-) Explain the following observations : (i) Ammonia has a higher boiling point than phosphin. (ii) Helium does not form any chemical compound. (iii) Bi (V) is a stronger oxidising agent than Sb (V).

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Account for the follwing : (i) Bi(v) is a stronger oxidizing agent then Sb(v). (ii) N-N single bond is weaker then P - P Single bond. (iii) Noble gases have very low boiling points.

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U-LIKE SERIES-THE D-AND F-BLOCK ELEMENTS -VERY SHORT ANSWER QUESTIONS (1 mark each)
  1. What is meant by lanthanoid contraction ?

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  2. Why does copper not replace hydrogen from acids ?

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  3. Why is Bi(V) a stronger oxidant than Sb(V) ?

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  4. Write the outer electronic configuration of Cr atom (Z = 24).

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  5. The electronic configuration of a transition element in +3 oxidation s...

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  6. Which is more basic La(OH)(3) or Lu(OH)(3) ? Why ?

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  7. How is the magnetic moment of a species related to the number of unpai...

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  8. Which property of the transition elements makes them good catalysts ?

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  9. What is the effect of increasing pH on K(2)Cr(2)O(7) solution ?

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  10. Why is third ionisation energy of manganese [Atomic number = 25] unexp...

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  11. Why is electronic configuration 1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(2)3d...

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  12. Name the lanthanoid element which exhibits a +4 oxidation state beside...

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  13. What is the difference between the electronic configurations of lantha...

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  14. State a consequence of lanthanoid contraction shown by transition elem...

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  15. Why is that orange solution of K(2)Cr(2)O(7) turns yellow on adding N...

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  16. Why do most transition metal ions show variable oxidation states ?

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  17. Why is Ce^(4+) in aqueous solution a good oxidising agent?

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  18. One unpaired electron in atom contributes a magnetic moment of 1.1 BM....

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  19. Why do Zr and Hf exhibit similar properties?

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  20. Name one ore of manganese and chromium.

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