Q16 of 26 Page 1

(a) How would you account for the following :

(i) The chemistry of actinoids is more complicated as compare to lanthanoids.


(ii) Transition metal forms complex compounds.


(b) Complete the following reaction


2MnO4- + 6H+ + 5 S032-→


(a) (i) This is due to the radioactive nature of actinoids and the poor shielding effect of 5f orbital in comparison to 4f orbital which are deeply penetrated.


(ii) Transition metals have vacant d orbital which makes them suitable for complex formation. Also their ability to show variable oxidation states helps in complex formation.


(b) 2MnO4- + 6H+ 5 S032-→2Mn2+ + 5SO42- + 3H2O


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14

Give reason for following observation:

(i) Physisorption decrease with increase in temperature.


(ii) Addition of alum purifies the water.


(iii) Brownian movement provides stability to colloidal solution.


 15

(i) Name the method used for the refining of Zirconium.

(ii) What is the role of CO in the extraction of Iron?


(iii) Reduction of metal oxide to metal becomes easier if the metal obtained in liquid state. Why?


 17

(i) Draw the geometrical isomers of [Co(en)2Cl2]+

(ii) On the basis of CFT, write electronic configuration of d4 ion ∆° >P


(iii) [NiCl4]2- is paramagnetic whereas [Ni(C0)4]is a diamagnetic, though both are tetrahedral, why?(atomic no of Ni= 28)


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How do you convert the following:

(i)Prop-1-ene to 1-fluropropane


(ii) Chlorobenzene to 2-chlorotoulene


(iii)Ethanol to propanenitrile.


OR


Write the main product when


(i) N-butyl chloride is treated with alcoholic KOH.


(ii) 2,4,6-trinitrochlorobenzene is subjected to hydrolysis.


(iii) Methylchloride is treated with AgCN