Which of the following cation is blue in colour?

Cu²⁺

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Na⁺

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Ca²⁺

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Zn²⁺

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Solution

The correct option is A
Cu²⁺

$C u^{2 +}$ is blue in colour. Sodium, calcium and zinc ions are colourless.

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Similar questions

Q. Which of the following cations is not hydrolyzed in aqueous solution?
(i)

M g^{2 +}

(ii)

C a^{2 +}

(iii)

N a^{+}

(iv)

K^{+}

Q. Arrange the following in the decreasing order of their coagulation power:

A l^{3 +}, N a^{+}, C a^{2 +}

Q. Which one of following species are isoelectronic?

S^{2 -}, N a^{+}, C a^{2 +}, C l^{-}

The charge/ size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of the polarizing power of the cationic species, $K^{+}, C a^{2 +}, M g^{2 +}, B e^{2 +}$

Which of the following sets contain only isoelectronic ions?
(i) $Z n^{2 +}, C a^{2 +}, G a^{3 +}, A l^{3 +}$

(ii) $K^{+}, C a^{2 +}, S c^{3 +}, C l^{-}$

(iii) $P^{3 -}, S^{2 -}, C l^{-}, K^{+}$

(iv) $T i^{4 +}, A r, C r^{3 +}, v^{5 +}$

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Which of the following cation is blue in colour?

The correct option is A Cu2+ Cu2+ is blue in colour. Sodium, calcium and zinc ions are colourless.

The correct option is A
Cu²⁺

$C u^{2 +}$ is blue in colour. Sodium, calcium and zinc ions are colourless.