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Q53) What is the oxidation number of Co in [Co(NH3)4Cl(NO2)] [ BHU 1999]




SOLUTION

Let Co oxidation state be x
x + 4 ×0 + 1×(-1) + 1×(-1) = 0
∴ x = +2
Answer: (a)


Q54) the correct order of hybridization of the central atom in the following species NH3, [PtCl4]2-, PCl5 and BCl3 is [AtNo pt=78] [ IIT screening test 2001]




SOLUTION


Answer: (b)


Q55) The oxidation number of cobalt in K[Co(CN)4] is ..[MP PMT 2001]



SOLUTION


Answer:(d)



Q56) Which of the following is an organometallic compound? [ IIT 1997]



SOLUTION


Answer: (d)


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