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Explain why Cu^(+) ion is not stable in ...

Explain why `Cu^(+)` ion is not stable in aqueous solutions?

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`Cu^(2+)`is more stable in aq. medium then Cut due to high `triangleH_(hyd)`of `Cu^(2+)`
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State the reason for the following : (i) Cu (I) ion is not stable in an aqueous solution. (ii) Unlike Cr^(3+),Mn^(2+),Fe^(3+) and the subsequent other M^(2+) ions of the 3d series, the 4d and 5d series metals generally do not form stable oxidation states.

(a) What is meant by the term lanthanoid contraction ? What is it due to and what consequences does it have on the chemistry of elements following lanthanoids in the periodic table ? (b) Explain the following observations : (i) Cu^(+) ion is unstable in aqueous solutions . (ii) Although Co^(2+) ion appears to be stable , it is easily oxidised to Co^(3+) ion in the presence of a strong ligand. (iii) The E_(Mn^(2+)//Mn)^(@) value for manganese is much more than expected from the trend for other elements in the series.

Out of Cr^(2+) and Cr^(3+) , which one is stable in aqueous solution?

Cu^(+) ion is not stable in aqueous solution because because of dispropotionation reaction. E^(@) value of disproportionation of Cu^(+) is [E_(Cu^(2+)//Cu^(+))^(@)=+ 0.15 V, E_(Cu^(2+)//Cu)^(@)=0.34 V]

(a) Following are the transition metal ions of 3d series: Ti^(4+),V^(2+),Mn^(3+),Cr^(3+) (Atomic numbers: Ti=22,V=23,Mn=25,Cr=24 ) Answer the following: (i) Which ion is most stable in an aqueous solution and why? (ii) Which ion is a strong oxidising agent and why? (iii) Which ion is colourless and why? (b) Complete the following equations: (i) 2MnO_(4)^(-)+16H^(+)+5S^(-)to (ii) KMnO_(4)overset(heat)to

Which of the following ions is the most stable in aqueous solution ? (At . No . Ti = 22, V = 23, Cr = 24, Mn = 25)

Copper (I) ions are not known in aqueous solution.

Which one of the following species is stable in aqueous solution?

Assertion : Cuprous ion (Cu^(+)) is colouless whereas cupric ion (Cu^(++)) is blue in the aqueous solution. Reason : Cuprous ion (Cu^(+)) has unpaired electrons while cupric ion (Cu^(++)) does not .

AAKASH INSTITUTE ENGLISH- ALCOHOLS, PHENOLS AND ETHERS-Assignment Section -D (Assertion - reason type question)
  1. Explain why Cu^(+) ion is not stable in aqueous solutions?

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  2. Assertion : Boiling point of p-nitrophenol is greater than that of o-n...

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  3. A : When C(2) H(5) - O- CH(3) is reacted with one mole of Hl then C(2...

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  4. A : When 3,3-dimethyl butan - 2 - ol is heated in presence of concentr...

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  5. A : In esterification reaction , HCOOH is the most reactive acid among...

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  6. A : Ethers can't be distilled upto dryness due to fear of explosion . ...

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  7. Phenol is less acidic than........... .

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  8. A : CH(3) - underset(O)underset(||)(C)-COOH gives haloform reaction ...

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  9. A : Diphenyl ether is prepared by Williamson synthesis . R : This...

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  10. A : Grignard's reagent is prepared in the presence of ether . R :...

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  11. A : CH(3) - underset(CH(3))underset(|)overset(CH(3))overset(|)(C)-CH=...

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  12. A : Two moles of Grignard reagent is consumed in the formation of ter...

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  13. A : bond angle in ether is slightly greater than normal tetrahedral an...

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  14. A : CH(3)-underset(CH(3))underset(|)overset(CH(3))overset(|)(C)-O-CH...

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  15. A : Ortho - cresol is weaker acidic than meta-cresol . R : It is d...

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  16. A : Among all ortho halophenol , fluorophenol is least acidic . R ...

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  17. A : In esterification reaction alcohol act as nucleophile . R : ...

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  18. A : Phenol is manufactured by Dow 's pocess. R : It involves the ...

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  19. A : Primary alcohol is prepared by the reaction of primary amine with ...

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  20. A : The reactivity order of alcohols is 1^(@) gt 2^(@) gt 3^(@) for ...

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  21. A : The dehydration of ethyl alcohol in presence of Al(2)O(3) at 633 ...

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