Home
Class 12
CHEMISTRY
Nickel chloride, when treated with dimet...

Nickel chloride, when treated with dimethyl gyloxime in presence of ammonium hydroxide, a bright red precipitate is obtained. Answer the following:
(a) Draw the structure of the complex showing H-bonds
(b) Give oxidation state of nickel and its hybridization
(c) Predict the magnetic behaviour of the complex

Text Solution

Verified by Experts

Oxidation state of nickel is +2 and hybridization is `dsp^(2) mu_(s) =sqrt( n(ni+2)) BM n = 0 .therefour mu_(s) = 0`
(b) `+2, dsp^(2)
(c)` diamagnetic
Promotional Banner

Similar Questions

Explore conceptually related problems

When diemethyl glyoxime is added to the aqueous solution of nickel (II) chloride in presence of dilute ammonia solution, a bright red coloured precipitate is obtained . (a) Draw the structure of bright red substance . (b) Write the oxidation state of nickel in the substance and hybridisation. (c ) State whether the substance is paramagnetic or diamagnetic.

NiCI_(2) in the presence of dimethy1 glyoxime (DMG) gives a complex which precipitates in the presence of NH_(4)OH giving a bright red colour . (a) Draw its structure and show H bonding (b) Give the oxidation state of Ni and its hybridisation (c ) Predict whether it is paramagnetic or dimagnetic .

An alcoholic solution of dimethylglyoxime is added to an aqueous solution of nickel(II) chloride.Slow addition of ammonium hydroxide led to the precipitation of a bright-red coloured metal complex. Find out the number of hydrogen bonds present in the structure of the complex.

Write down the IUPAC name for each of the following complexes and indicate the oxidation state, electronic configuration and coordination number. Also give stereochemistry and magnetic moment of the complex K[Cr(H_2O)_2(C_2O_4)_2].3H_2O

When metal X is treated with sodium hydroxide, a white precipitate (A) is obtained, which is soluble in excess of NaOH to give soluble complex (B). Compound (A) is soluble in dilute HCl to form compound (C). The compound (A) when heated strongly gives (D), which is used to extract metal. Identify (X), (A), (B), (C) and (D). Write suitable equations to support their identities.

(a) What is a ligand ? Give an example of a bidentate ligand. (b) Explain as to how the two complexes of nickel, [Ni(CN)_(4)]^(2-) and Ni(CO)_(4) have different structures but do not differ in their magnetic behaviour. (Ni = 28)

Number of the following statements is/are correct? (A) Greater the stability constant of a complex ion, greater is its stability (B) Greater the oxidation state of the central metal ion, greater is the stability of the complex (C ) CO stabilises complex becuase of its synergic Bonding. (D) Chelate complexes have low stability constants

Identify the anion present in the following compounds: i] Compound X on heating with copper turnings & conc. sulphuric acid liberates a reddish brown gas. ii] When a solution of compound Y is treated with silver nitrate solution a white precipitate is obtained which is soluble in excess of ammonium hydroxide solution. iii] Compound Z which on reacting with dilute sulphuric acid liberates a gas which turns lime water milky, but the gas has no effect on acidified potassium dichromate solution. iv] Compound L on reacting with barium chloride solution gives a white precipitate insoluble in dilute hydrochloric acid or dilute nitric acid.

An alcohol A, when heated with conc. H_(2)SO_(4) gives an alkene B. When B is bubbled through bromine water and the product obtained is dehydrohalogenated with exccess of sodamide, a new compound C is obtained. The compound C gives D when treated with warm dilute H_(2)SO_(4) in the presence of HgSO_(4) . D can also be obtained either byh oxidising A with KMnO_(4) or form acetic acid through its calcium salt. Identify A, B, C, and D.

Identify the cation (positive ion) and anion (negative ion) in - 'A','B' & 'C'. Also identify P, Q, R, S, T, U, V, W. a] Substance 'A' is water soluble and gives a curdy white precipitate 'P' with silver nitrate solution. 'P' is soluble in ammonium hydroxide but insoluble in dil. HNO_3 . Substance 'A' reacts with ammonium hydroxide solution to give a white precipitate ' soluble in excess of NH_4OH . b] A solution of substance 'B' is added to barium chloride solution. A white ppt. 'R' is formed, insoluble in dil. HCl or HNO_3 . A dirty green ppt. 'S' is formed on addition of ammonium hydroxide to a solution of 'B' and the precipitate is insoluble in excess of ammonium hydroxide. c] Substance 'C' is a coloured, crystalline salt which on heating decomposes leaving a black residue 'T'. On addition of copper turnings and conc. H_2SO_4 to 'C' a coloured acidic gas 'U' is evolved on heating. A solution of'C' is added to NaOH soln. until in excess. A pale blue ppt. 'P' is obtained insoluble in excess of NaOH A solution of 'C' is then added to NH_4OH soln. in excess to give an inky blue solution 'V'. A solution of 'C' is warmed and hydrogen sulphide gas is passed through it. A black ppt. 'W' appears.