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Elimination Reaction

Ni^2+ can be ...

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Ni^{2+ }can be estimated by used dmg and forms a Rosy red ppt. the complex is extra stabilised by which bonds ?

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N i^{2 +}

ion can be estimated by using dimethyl glyoxime and forms a cherry-red precipitate. The complex is stabilized by :

T i

is purified by Van Arkel method. In it, the formula of metal iodide vapour formed is

T i I_{p}

.
(ii) The oxidation state of

F e

in Fool's gold is q.
(iii) In the test of

N i^{2 +}

, a rosy red ppt. of

[N i (d m g)_{2}]

is formed.
In it, r five membered rings and s six membered H-bonding rings are formed.
Then, the value of

\frac{p + q + r + s}{2}

Q. An alcoholic solution of dimethylglyoxime is added to an aqueous solution of nickel (II) chloride. Slow addition of ammonium hydroxide lead to the precipitation of a Rosy-red colored metal complex. Then find out the number of hydrogen bonds present in the structure of the complex.

Q. Give the correct of initials T or F for following statements. Use T if statement is true and F if it is false.
(I)

C o (I I I)

is stabilised in presence of weak field ligands, while

C o (I I)

is stabilised in presence of strong field ligand.
(II) Four coordinated complexes of

P d (I I)

P t (I I)

are diamagnetic and square planar.
(III)

[N i (C N)_{4}]^{4 -}

[N i (C O)_{4}]

are diamagnetic tetrahedral and square planar respectively.
(IV)

N i^{2 +}

ion does not form inner orbital octahedral complexes.

Q. Hardness of water is estimated by the simplest complex formation titration. Complex formed by cation in hard water during estimation of hardness is:

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