Which of the following are the examples of acidic radicals?

B r^{-}

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{Cl}^{-}

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{Cu}^{2 +}

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N a^{+}

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Solution

The correct options are
A $B r^{-}$
B ${Cl}^{-}$

When an acid releases hydrogen ion, the remaining species gains negative charge and is called acidic radical or anion.

For example, when HCl loses $H^{+}$ ion, it forms $C l^{-}$ which is an acidic radical.

Among the given options, $C l^{-}$ and $B r^{-}$ are acidic radicals.

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Question 20

In which of the following pairs, the ions are isoelectronic ?

(a) $N a^{+}, M g^{2 +}$ (b) $A l^{3 +}, O^{-}$ (c) $N a^{+}, O^{2 -}$ (d) $N^{3 -}, C l^{-}$

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

Which of the following is the correct sequence for atomic radii

C u^{2 +}, N a^{+}, C l^{-}, S O_{4}^{2 -}, F e^{3 +}

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