Question

Complexes formed in the following methods are :
(I) Mond's process for purification of nickel.
(II) Removal of unreacted AgBr from photographic plate.
(III) Removal of lead poisoning from the body.

• A. $Ni(CO{)}_4$, $\left[Ag\right(CN{)}_2{]}^{-}$, $\left[Pb\right(EDTA){]}^{2-}$
• B. $Ni(CO{)}_4$, $\left[Ag\right(S_2{O}_3{)}_2{]}^{3-}$, $\left[Pb\right(EDTA){]}^{2-}$
• C. $Ni(CO{)}_6$, $\left[Ag\right(S_2{O}_3{)}_2{]}^{3-}$, $\left[Pb\right(EDTA){]}^{4-}$
• D. $Ni(CO{)}_6$, $\left[Ag\right(S_2{O}_3){]}^{-}$, $\left[Pb\right(EDTA){]}^{2-}$

Answer 1

The correct option is B $Ni(CO{)}_4$, $\left[Ag\right(S_2{O}_3{)}_2{]}^{3-}$, $\left[Pb\right(EDTA){]}^{2-}$

(I) Mond's process for purification of $Ni-\left[Ni\right(CO{)}_4]$
(II) Removal of unreacted AgBr from photographic plate$-\left[Ag\right(S_2{O}_3{)}_2{]}^{3-}$
(III) Removal of lead poisoning from body $-\left[Pb\right(EDTA){]}^{2-}$