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(a) Following are the transition metal i...

(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^(2-)to`
(ii) `KMnO_(4)overset("Heat")to`

Text Solution

Verified by Experts

(a) (i) `Cr^(3+)` ion is most stable in an aqueous solution because it has stable half-filled `(t_(2g))` configuration.
(ii) `Mn^(3+)` is a strong oxidising agent because `Mn^(2+)` formed as a result of reduction has half-filled `(d^(5))` stable configuration.
(iii) `Ti^(4+)` is colourless. There is no possibility of d-d transition and hence no absorption of light.
(b) (i) `2MnO_(4)^(-)+16H^(+)+5S^(2-)to2Mn^(2+)+8H_(2)O+5S`
(ii) `2KMnO_(4)overset("Heat")toK_(2)MnO_(4)+MnO_(2)+O_(2)`
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Following are the transition metal ions of3d series : Ti^(4+),V^(2+), Mn^(3+), Cr^(3+) (Atomci number : Ti = 22, V = 23 , Mn = 25 , Cr = 24) Anser the following : (i) Which ion is most stable in aqueous solution and why ? (ii) Which ion is a strong oxidizing agent and why ? (iii) Which ion is colourless and why ?

(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

Knowledge Check

  • Which one of the following transition metals ions is colourless in aqueous solution ?

    A
    `Ti^(4+)`
    B
    `V^(4+)`
    C
    `Mn^(2+)`
    D
    `Fe^(3+)`

  • Which one of the following transition metals ions is colourless in aqueous solution ?

    A
    `Ti^(4+)`
    B
    `V^(4+)`
    C
    `Mn^(2+)`
    D
    `Fe^(3+)`

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

    A
    `Ti^(3+)`
    B
    `Mn^(3+)`
    C
    `Cr^(3+)`
    D
    `V^(3+)`

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    In the following ions : Mn^(3+),V^(3+),Cr^(3+),Ti^(4+) (Atomic no. : Mn = 25, V = 23, Cr = 24, Ti = 22) (a) Which ion is most stable in an aqueous solution ? (b) Which ion is the strongest oxidising agent ? (c) Which ion is colourless ? (d) Which ion has the highest number of unpaired electrons ?

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

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    The basic character of the transition metal monoxides follows the order (Atomic numbers- Ti = 22, V = 23, Cr = 24, Fe = 26)

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