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Q145) The trace metal present in insulin is [ KCET 1991]




SOLUTION


Answer: (c)


Q146) Bessemer converter is used in the manufacture of .. [ CPMT 1991]




SOLUTION


Answer: (b)


Q147) Of the following which has the highest magnetic moment? [ EAMCET 2001]



SOLUTION

V3+ = 3d2 , have 3 unpaired electrons
Mn2+= 3d5 have 5 unpaired electrons
Fe2+ = 3d6 have 4 unpaired electrons
Cu2+ = 3d9 have one unpaired electron
AS Mn2+ have highest number of unpaired electrons thus have highest magnetic moment
Answer:(b)



Q148) The aqueous solution of the following salts will be coloured in the case of [ IIT 1990]



SOLUTION

In aqueous solution of Co(NO3)2, Co2+ ion have incompletely filled 3d orbital, hence coloured solution
Answer: (c)


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