Aqueous zinc oxide reacts with excess of $N a O H$ , the final products are:

Z n (O H)_{2}

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N a_{2} Z n O_{2}

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both

A

and

B

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none of them

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Solution

The correct option is B $N a_{2} Z n O_{2}$
Zinc oxide reacts with sodium hydroxide to produce zincate sodium and water. This reaction takes place at a temperature of 500-600°C.

$Z n O + 2 N a O H \to N a_{2} Z n O_{2} + H_{2} O$
Hence option $B$ is correct.

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