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Aqua Regia and Its Uses

Write a balan...

Question

Write a balanced equation when zinc reacts with sodium hydroxide.

2 Z n + 2 N a O H \to 2 N a + 2 Z n (O H)_{2}

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Z n + N a O H \to N a + Z n (O H)_{2}

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Z n + 2 N a O H \to 2 N a + Z n (O H)_{2}

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None of these

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Solution

The correct option is D None of these
None of the given option is correct. Zn reacts with sodium hydroxide to form sodium zincate and the liberation of hydrogen gas occurs. The balanced equation is , $Z n + 2 N a O H \to N a_{2} Z n O_{2} + H_{2}$ . So option D is correct.

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