An experimental set up is shown in the figure. Identify the metal X and gas Y respectively in the figure.

Zinc,

H_{2}

gas

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Copper,

C O_{2}

gas

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Silver,

C O_{2}

gas

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Platinum,

H_{2}

gas

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Solution

The correct option is A Zinc, $H_{2}$ gas
Zinc reacts with dil. HCl to give hydrogen gas which is collected above water as it is the lightest gas while other metals are unreactive towards dil. HCl as they are inert present below the hydrogen in the reactivity series.

$Z n (s) + H C l (d i l .) \to Z n C l_{2} (a q) + H_{2} (g)$

Option A is correct.

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