When metal Z is added to dilute HCl solution, there is no evolution of gas. Metal 'Z' is:

potassium

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sodium

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silver

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zinc

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Solution

The correct option is C silver
Metals such as potassium, sodium and zinc are more reactive than hydrogen. Hence they displace hydrogen from dilute acids and release hydrogen gas.

Silver is less reactive than hydrogen and fails to displace hydrogen from dilute acids. Thus, hydrogen gas is not evolved.

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