Write the formulae of the following coordination compounds:

(i) potassiumtetracyanonickel(II)

(ii) triamminetrinitrocobalt(III)

(i)The compound C₆H_l2 shows optical isomerism. Draw the structural formula of the compound and name it.

(ii) Name any three types of isomerisms that the compound with molecular formula C₄H₇Cl can give rise to. Also, represent the structures of the compounds relevant to these isomers.

Complete the following statements by selecting the correct alternative from the choices given:

 The geometry of XeF₆ molecule and the hybridization of Xe atom in the molecule is:

Complete the following statements by selecting the correct alternative from the
choices given:

In the complexes [Fe(CN)6]^3- and [Pt(en) (H₂O)2(NO₂)(Cl)]₂⁺ the respective
oxidation numbers of central metal atoms are :

Write the IUPAC names of the following coordination compounds: 
(i) [Cr(NH₃)₄(H₂O)₂]Cl₃
(ii) [PtCl₂(NH₃)₄] [PtCl₄]

State the hybridization and magnetic property of [Fe(CN)₆]^3- ion according to the valence bond theory.

(i) What type of isomers are [Co(NH₃)₅Br]SO₄ and [Co(NH₃)₅SO₄]Br.? Give a chemical test to distinguish between them.

(ii) Write the structures of optical isomers of the complex ion [Co(en)₂Cl₂]⁺

Write the formula of the following compounds: 
(i) Triamminetriaquachromium(III)chloride
(ii) Potassiumhexacyanoferrate(III)

Name the types of isomerism shown by the following pairs of compounds: 

(i) [CoCl(H₂O)(NH₃)₄]Cl₂  and  [CoCl₂(NH₃)₄]Cl.H₂O

(ii) [Pt(NH3)₄][PtCl₆] and [Pt(NH₃)₄Cl₂][PtCl₄]

For the complex ion of [Co(NH₃)₆]³⁺ : 
(i) State the hybridisation of the complex.
(ii) State the magnetic nature of the complex.