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Give an example to show the effect of co...

Give an example to show the effect of concentration of nitric acid on the formation of oxidation product.

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The products of oxidation depends on the concentration of nitric acid, nature of metal and temperature of reaction.
`3Cu + underset("dilute")(8HNO_(3)) to 3Cu(NO_(3))_(2) + 2NO + 4H_(2)O`
`Cu + underset("conc")(4HNO_(3)) to Cu(NO_(3))_(2) + 2NO_(2) + 2H_(2)O`
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Nucleophilic aliphatic substitution reaction is mainly of two types: S_(N)1 and S_(N)2 . The S_(N)1 mechanism is a two step process. Reaction velocity of S_(N)1 reaction depends only on the concentration of the substrate. Since product formation takes place by the formation of carbocation, optically active substrate gives (+) and (-) forms of the product. In most of the cases the product usually consits of 5-20% inverted product and 80-95% racemised species. The more stable the carbocation, the greater is the proportion of racemisation. In solvolysis reaction, the more nucleophilic the solvent, the greater is the proportion of inversion. For the gives reaction, Which substrate will give maximum racemisation?

Nucleophilic aliphatic substitution reaction is mainly of two types: S_(N)1 and S_(N)2 . The S_(N)1 mechanism is a two step process. Reaction velocity of S_(N)1 reaction depends only on the concentration of the substrate. Since product formation takes place by the formation of carbocation, optically active substrate gives (+) and (-) forms of the product. In most of the cases the product usually consists of 5-20% inverted product and 80-95% racemised species. The more stable the carbocation, the greater is the proportion of racemisation. In solvolysis reaction, the more nucleophilic the solvent, the greater is the proportion of inversion. Which one of the following compound will give S_(N)1 reaction predominantly?

KUMAR PRAKASHAN-THE P-BLOCK ELEMENTS -SECTION -D (NCERT EXEMPLAR SOLUTION) (SHORT ANSWER TYPE QUESTIONS)
  1. Write a balanced chemical equation for the reaction showing catalytic ...

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  2. Write the structure of pyrophosphoric acid.

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  3. PH3 forms bubbles when passed slowly in water but NH3 dissolves. Expla...

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  4. In PCl5, phosphorus is in sffid hybridised state but all its five bond...

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  5. Why is nitric oxide paramagnetic in gaseous state but the solid obtain...

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  6. Give reason to explain why ClF3 exists but FCl3 does not exist.

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  7. Out of H2O and H2S, which one has higher bond angle and why ?

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  8. SF6 is known but SCl6 is not. Why ?

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  9. On reaction with Cl2, phosphorus forms two types of halides 'A' and 'B...

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  10. In the ring test of NO(3) ion, Fe^(2+) ion reduces nitrate ion to nit...

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  11. Explain why the stability of oxoacids of chlorine increases in the ord...

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  12. Explain why ozone is thermodynamically less stable than oxygen ?

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  13. P4O6 reacts with water according to equation P4O6 + 6H2O to 4H3PO3. C...

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  14. White phosphorus reacts with chlorine and the product hydrolyses in th...

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  15. Name three oxoacids of nitrogen. Write the disproportionation reaction...

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  16. Nitric acid forms an oxide of nitrogen on reaction with P4O10. Write t...

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  17. Phosphorus has three allotropic forms : (i) white phosphorus (ii) ...

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  18. Give an example to show the effect of concentration of nitric acid on ...

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  19. PCl(5) reacts with finely divided silver on heating and a white silver...

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  20. Phosphorus forms a number of oxoacids. Out of these oxoacids phosphini...

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