Which of the following metals, in reaction with acids like HCl, do not form bubbles in the solution?

Zinc (Zn)

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Iron (Fe)

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Aluminium (Al)

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Gold (Au)

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Solution

The correct option is A Gold (Au)
Most metals on reacting with acids liberate hydrogen gas. Gold (Au) and platinum (Pt) are noble metals and are inert towards HCl. So, gold doesn’t react with HCl.

Thus, no bubbles of hydrogen gas are formed.

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