Q.

Which is most correct order of stability?

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a

Zn+2>Cu+2>Ni+2=Co+2>Fe+2>Mn+2

b

Zn+2<Cu+2<Ni+2<Co+2<Fe+2<Mn+2

c

Zn+2=Cu+2>Ni+2>Co+2>Fe+2>Mn+2

d

Zn+2>Cu+2>Ni+2>Co+2>Fe+2>Mn+2

answer is A.

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Detailed Solution

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In ‘d’  block elements in +2 ox-state, as atomic number increases, stability increases

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