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Q1) Ammonia will not form complex ions with [ JIPMER 1994]




SOLUTION

Pb2+ is not a d-block element thus ammonia can not for a complex
Answer: (d)


Q2) Coordination number and oxidation number of cr in K3[Cr(C2O4)3] are respectively [ CBSE PMT 1995]




SOLUTION


Answer: (b)


Q3)The number of geometrical isomers for [Pt(NH3)2Cl2] is [ CBSE PMT 1995]



SOLUTION

cis- and trans- isomers are possible
Answer:(a)



Q4) In any ferric salt, on adding potassium ferrocyanide a prussian blue colour is obtained which is due to the formation of ..[BIT 1992]



SOLUTION

4Fe3+ + 3[fe(CN)6]4- → Fe4[Fe(CN)6]3 Prussian blue
Answer: (d)


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