Home
Class 12
CHEMISTRY
NiCl(2) in the presence of dimethyl glyo...

`NiCl_(2)` in the presence of dimethyl glyoxime (DMG) gives a complex with precipitates in the presence of `NH_(4)OH`, giving a bright red colour.
(i) Draw its structure and show H- bonding
(ii) Give oxidation state of Ni and its hybridisation .
(iii) Predict whether it is paramagnetic or diamagnetic .

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

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 .

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.

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

Dimethyl glyoxime gives a red precipitate with Ni^(2+) , which is used for its detection. To get this precipitate readily the best pH range is

A metal salt solution when treated with dimethyl glyoxime and NH_(4)OH give a rose red complex.The metal is

A metal complex having composition Cr(NH_(3))_(4)CI_(2)Br has been isolated in two forms A and B. The form A reacts with AgNO_(3) to give a white precipitate readily soluble in dilute aqueous ammonia whereas B gives a pale yellow precipitate soluble in concentrated ammonia. (i) Write the formulae of isomers A and B. (ii) State the hybridisation of chromium in each of them. (iii) Calculate the magnetic moment (spin only) of the isomer A.

(a) Draw Lewis structures for : (i) Ethanol (C_2 H_5 O H) (ii) BrNO (iii) HOCN (b) Give an isomeric structure for NH_2 OH and explain which structure is more stable.

(i) An organic compound A with molecular formula C_(7)H_(8) on oxidation by chromyl chloride in the presence of C Cl_(4) gives a compound B which gives positive Tollen's test. The compound B on treatment with NaOH followed by acid hydrolysis gives two product C and D. C on oxidation gives B which on further oxidation gives D. the compound D on distillation with sodalime gives a hydrocarbon E. Below 60^(@)C , concentrated nitric acid reacts with E in the presence of concentrated sulphuric acid forming a compound F. identify the compounds A,B,C,D,E and F. (ii) Give chemical test to distinguish : Formaldehyde and acetaldehyde.

A white crystalline compound (X) swells open heating and gives violet-coloured flame. Its aqueous solution gives the following reactions : (a) A white precipitate is formed, with BaCl_(2) in presence of HCl . (b) When treated with excess of NH_(4) OH , it gives white gelatinous precipitate. the white precipitate dissolves in NaOH and reappears on boiling with concentrated solution of NH_(4) Cl . ( c) It gives yellow precipitate with cobaltinitrite solution. Identify (X) and explain the reaction at steps a, b and c .

Give reason for the following : (i) Mn shows the highest oxidation state of +7 with oxygen but with fluorine, it shows the highest oxidation state of +4 (ii) Transition metals show variable oxidation states. (iii) Actinoids show irregularities in their electronic configurations.