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   TEST . XII –CBSE-CHEMISTRY (043), MM=50 SURFACE,CO-ORDINATION,ISOLATION,D-BLOCK AND P-BLOCK *************************************************************************************************** Q1.Why pcl5 is ionic in solid state.? 2 Q2.Why H20 is liquid and H2S is gas. 2 Q3.Write disproportation reaction of phosphorous. 2 Q4.Why KMnO4 is colour yet it doesn’t have electron in d orbital.? 2 Q5.Write only chemical reaction for the preperation of potasium permangnate and potasiun dichromate.? 2 Q6.Write the product in a rection when XeF6 react with 2H2O. 2 Q7.What is role of NaCN in froath flatation process.? 2 Q8.What is leaching.Give example reaction of it with extraction of silver.? 2 Q9.What is van arkel process.? 2 Q10.Defference between calcination and roasting.? 2 Q11.What is electrophoresis,&coagulation.? 2 Q12.What is instability constant.How it is related to stepwise and overall stabilty costant.? 2 Q13.Why [ Fe(CN)6]4+ is inner octahedral but Fe[cl6]4+ is outer octahedral.? 2 Q14.Write IUPAC name of the following. 1 K3[Cr(OH)3cl2] Q15.What is CFSE.How its magnitude change with strength of ligands.? 2 Q16.Drow the splitting diagrame of [Fe(cl)6]4+.? 2 Q17.What is coordinate isomerism give an example.? 2 Q18.Drow the structure of H2S2O8, H3PO4, XeOF4.? 3 Q19.Why Icl3 is more reactive then I2. 2 Q20.SF6 is nknown but Scl6 is not known.? 2 Q21.Write the impotant properties of white phosphorous.? 2 Q22.What is the catalyst used for the preperation of sulphuric acid from contact process. And give all reaction.? 2 Q23.Why all bond in Pcl5 is not equal.? 2 Q24.Why only Xenon make compound with O na F from innert gases but other doesn’t.? 2 Q25.What is difference between covalency and oxidation state taking example of N in N2O5.? 2