Among the following, the elements which produce $H_{2}$ gas upon reaction with $N a O H .$
$M g, C a, A l, Z n, P b, S n, S i C, C$

A l, Z n, P b, C a

only

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A l, Z n, P b, S n, M g, C a

only

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S n, S i C, C, M g, C a

only

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A l, Z n, P b, S n

only

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Solution

The correct option is D $A l, Z n, P b, S n$ only
$A l, Z n, P b, S n$ liberate $H_{2}$ on reaction with alkali.

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