The less stable oxidation states of Cr are:A. `Cr^(2+)`B. `Cr^(3+)`C. `Cr^(4+)`D. `Cr^(5+)`

The less stable oxidation states of Cr are:A. `Cr^(2+)`B. `Cr^(3+)`C.

1.	The less stable oxidation states of Cr are:A. `Cr^(2+)`B. `Cr^(3+)`C. `Cr^(4+)`D. `Cr^(5+)`
Answer» Correct Answer - A::C::D `Cr^(3+)` is most stable because in aqueous solution it has higher CFSE on account of half filled `t_(2g)^(3)` energy level of 3d orbitals in octahedral spliting.

Discussion

No Comment Found

Related InterviewSolutions

Which element among d-block element has(i) the lowest melting point and (ii) the highest melting point
Name the (i) lightest and the (ii) heaviest element (in terms of density)among the transition elements.
Which of the following halides react(s) with `AgNO_(3(aq))` to give a precipitate that dissolves in `Na_(2)S_(2)O_(3(aq))`A. HClB. HFC. HBrD. `HI`
Uub is the symbol for the element with atomic number-A. 102B. 108C. 110D. 112
Potassium manganate `(K_2MnO_4)` is formed whenA. `Cl_(2)` is passed into an aqueous solution of `KMnO_(4)`B. `MnO_(2)` is fuesed with `KOH`C. Formaldehyde reacts with `KMnO_(4)` in the presence of strong alkaliD. `KMnO_(4)` reacts with conc. `H_(2)SO_(4)`
Which of the following can be employed for the conversion of potassium manganate to potassium permanganate?A. `O_(3)`B. `Cl_(2)`C. `CO_(2)`D. All.
Potassium manganate `(K_2MnO_4)` is formed whenA. chlorine is passed into aqueous `KMnO_(4)` solutionB. manganese dioxide is fused with KOH in airC. formaldehyde reacts with potassium permanganate in the presence of strong alkaliD. potassium permanganate reaction with conc. `H_(2)SO_(4)`
Pick out the correct statement from the following: 1. Cobalt (III) is more stable in octahedral complexes. 2. Zinc forms coloured ions or complexes 3. Most of the d-block elements and their compounds are ferromagnetic. ltBrgt 4. Osmium shows (VIII) oxidation state 5. cobalt (II) is more stable in octahedral complexes.A. 1 and 2B. 1 and 3C. 2 and 4D. 1 and 4
`{:("Element",Cr,Mn,Fe),(E^(underset(-)(o))(M^(2+)//M),-0.90V,-1.18V,-0.4V),(E^(underset(-)(o))(M^(3+)//M^(2+)),-0.41V,+1.57V,+0.8V):}` ltbr. Use this data to comment upon (i) the stability of `Fe^(3+)` and `Mn^(2+)` in acid solutions, (ii) The ease with which iron can be oxidised as compared to the similar process for either Cr or Mn metals.
Why is the `E^(Theta)` value for the `Mn^(3+)//Mn^(2+)` couple much postive than for `Cr^(3+)//Cr^(2+) or Fe^(3+)//Fe^(2+)`? Example

The less stable oxidation states of Cr are:A. `Cr^(2+)`B. `Cr^(3+)`C. `Cr^(4+)`D. `Cr^(5+)`

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment