The pair that gives colour when reaction with NH 4 SCN isA- Cu 2- Hg 2-B- Cr 3- Al 3-C- Co 2- F e 3-D- Zn 2- Cu 2-

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Reaction with Metals

The pair that...

Question

The pair that gives colour when reaction with $N H_{4} S C N$ is

C u^{2 +}, H g^{2 +}

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C r^{3 +}, A l^{3 +}

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C o^{2 +}, F e^{3 +}

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Z n^{2 +}, C u^{2 +}

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For cell reaction, $Z n + C u^{2 +} \to Z n^{2 +} + C u,$ cell representation is

N H_{4} S C N

F e^{3 +}

C o^{2 +}

C u^{2 +}

H_{2} S

H C l

The cell representation of the given reaction is:
Zn(s) + Cu²⁺ → Zn²⁺ + Cu(s)

H_{2} S

{C u}^{2 +}

C o^{2 +}

H g^{2 +}

N i^{2 +}

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