dear expert in the study material of coordination u have given the concept of basic thing and in example u have given about optical isomerism, nomenclature how we r able to understand

1- i m unable to understand soln of this question

The ratio of moles of AgCl precipitated on adding AgNO₃to PdCl₂.4NH₃and CoCl₃.4NH₃, respectively, is

plz make me clear and explain the answer step by step

2- i have doubt that no2 exist at neutral and +1 form i m unable to understand which i have to take while calculating the oxi no and ean explain the logic behind this

Q- this is given in ncert exampler - when 0.1 mol cocl3(nh3)5 is treated with excess of agno3 o.2 mole of agcl are obtained find conductivity

Q- MATCH THE FOLLOWING

1. column1- co(nh3)₆ 3+ , ti(h20)6 3+, ni(h2o)6 2+, ni(h2o)4(en) 2+ aq

column 2- violet, green, pale yellow, yellowish orange, blue

Q-

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1. 

Complex	Colour
[Co(NH3)6]3+	yellow
[Ti(H2O)6]3+	Violet
[Ni(H2O)6]2+	Green
[Ni(H2O)4(en)]2+	Pale blue

2. A complex compound consist of 2 valencies i.e. primary valency and secondary valency. Out of which primary valency which is satisfied by a species present outside the coordination sphere is ionisable and the secondary valency satisfied by ligands are unionisable. 
In case of PdCl₂.4NH₃, the structure of the complex is [Pd(NH₃)₄]Cl₂. As two chlorine atoms are satisfying primary valency therefore they are ionisable.
 [Pd(NH₃)₄]Cl₂ ---------> ​ [Pd(NH₃)₄]²⁺ + 2Cl-
On treatment of excess of AgNO₃, it produces 2 mole of AgCl precipitate.
Case II
The structure of CoCl₃.4NH₃ is [Co(NH₃)Cl₂]Cl, which on dissociation produces 1 chloride ions
[Co(NH₃)Cl₂]Cl ------> ​[Co(NH₃)Cl₂]⁺ + Cl^- 
Hence, it forms 1 mole of AgCl precipitate. 
Therefore, The ratio of moles of AgCl precipitate is 2 :1. 
 
3. In most of the cordination compounds NO₂ exist as NO₂^- i.e. Nitrite ions.
Nitrite ions also exist as two isomers i.e. M$\stackrel{}{\leftarrow }$NO₂ ( Known as nitro) and M$\stackrel{}{\leftarrow }$ONO ( known as nitrito). In both the case NO₂ ligand attains negative charge. 
However, In some exceptional cases NO₂ also exist as NO₂⁺ i.e. Nitronium ions. 
Generally nitonium ions are quite reactive and hence coordination compounds formed by NO₂⁺ are less in number. 
Examples of some stable complex of NO₂⁺ are NO₂BF₄, NO₂PF₆ etc. 

4. As 0.1 mol compound on treatement with AgNO3 forms 0.2 moles of AgCl, it means two chlorine atoms are present outside the coordination sphere.
Therefore, CoCl₃(NH₃) exist as [Co(NH₃)₅Cl₂]Cl.
Dissociation of the above compound is as follow:
[Co(NH₃)Cl₅]Cl₂ ---------> [Co(NH₃)₅Cl] ⁺  + 2Cl^-
Which means the given compound form 3 particles i.e. 1 postivelty charged and 2 negitively charge particles.
Hence, the comductivity of compound corrosponds to 1:2 electrolyte.