Q. 405.0( 1 Vote )

B. A (4) B (3) C (2) D (1)

C. A (5) B (1) C (4) D (2)

D. A (4) B (1) C (2) D (3)

Answer :

The correct answer will be the option (iii) A (5) B (1) C (4) D (2)


Hence, matching the two columns the right combination will be:


A. [Co(NCS)(NH3)5](SO3) -5. + 3 (oxidation no.of Co, x =-1(-1)-(-2)=+3)


B. [Co(NH3)4Cl2]SO4 -1. + 4 (oxidation no. Of Co, x =-2x(-2)-1(-2)=+4)


C. Na4[Co(S2O3)3] -4.+ 2 (oxidation no. Of Co, x=-3(-2) – 4x(+1)=+2 )


D. [Co2(CO)8] –2. 0 . (as CO is a neutral ligand, therefore Co here has a zero oxidation state)

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