InterviewSolution
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InterviewSolution
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A metal complex having composition `Cr(NH_(3))_(4)CI_(2)Br` has been isolated in two forms A and B. The form A reacts with `AgNO_(3)` to give a white precipitate readily soluble in dilute aqueous ammonia whereas B gives a pale yellow precipitate soluble in concentrated ammonia. (i) Write the formulae of isomers A and B. (ii) State the hybridisation of chromium in each of them. (iii) Calculate the magnetic moment (spin only) of the isomer A. |
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Answer» (a) Isomer A: `[Cr(NH_(3))_(4)BrCI]CI.` Isomer B : `[Cr(NH_(3))_(4)CI_(2)]Br.` (b) Hybridisation of Cr in isomer A and B is `d^(2)sp^(3)`. (c) Number of unpaired electrons in `Cr^(3+)(3d^(3))` is 3. Magnetic moment `=sqrt(n(n+2)) = sqrt(3(3+2)) = 2.87 BM` |
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