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Zinc II Oxide

Out of the fo...

Question

Out of the following metals which will give $H_{2}$ on reaction with $N a O H$
$I$ : $Z n$
$I I$ : $A l$
$I I I$ : $B e$

I, I I, I I I

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I, I I I

only

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I I

Only

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I

only

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Solution

The correct option is A $I, I I, I I I$
$Z n + 2 N a O H \to N a_{2} Z n O_{2} + H_{2}$
$2 A l + 2 N a O H + 6 H_{2} O \to 2 N a [A l (O H)_{4}] + 3 H_{2} B e + 2 N a O H + 2 H_{2} O \to N a_{2} [B e (O H)_{4}] + H_{2}$

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