Which of the followings is an spectator ion in the reaction?
$2 N a + 2 H C l \to 2 N a C l + H_{2}$

N a^{+}

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C l^{-}

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H^{+}

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None of these

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Solution

The correct option is A $C l^{-}$
$2 N a + 2 H C l \to 2 N a C l + H_{2}$
0 +1 -1 +1 -1 0
So, ionic reaction is
$2 N a + 2 H^{+} \to 2 N a^{+} + H_{2}$
Only for chloride ions, oxidation state doesnt change, so they are spectator here.

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