Assign cations to their group in qualitative analysis

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

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1. A.
   (A)-(i), (B)-(ii), (C)-(iii), (D)-(iv)
2. B.
   (A)-(iii), (B)-(iv), (C)-(ii), (D)-(i)
3. C.
   (A)-(i), (B)-(iv), (C)-(ii), (D)-(iii)
4. D.
   (A)-(iv), (B)-(ii), (C)-(iii), (D)-(i)

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1. A.
   A $\rightarrow$ iii, $B \rightarrow$ i, $C \rightarrow$ iv, $D \rightarrow$ ii
2. B.
   $A \rightarrow$ i, $B \rightarrow$ iii, $C \rightarrow$ ii, $D \rightarrow$ iv
3. C.
   $A \rightarrow$ iv, $B \rightarrow$ ii, $C \rightarrow$ iii, $D \rightarrow$ i
4. D.
   $A \rightarrow$ i, $B \rightarrow$ iii, $C \rightarrow$ iv, $D \rightarrow$ ii

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1. A.
   ${Ni}^{2 +}$
2. B.
   ${Zn}^{2 +}$
3. C.
   ${Co}^{2 +}$
4. D.
   ${Fe}^{3 +}$

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1. A.
   +3
2. B.
   +4
3. C.
   +2
4. D.
   +7

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