Which of the following statements is not true with respect to the reactions of metals with oxygen, water and acid?

Gold generally does not react with oxygen, water and acid.

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Sodium reacts explosively with water and acid.

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Iron does not react with oxygen and water.

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Magnesium reacts vigorously with acid and produces hydrogen gas.

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Solution

The correct option is C Iron does not react with oxygen and water.

Iron reacts moderately with oxygen on strong heating. Iron also reacts moderately with water (steam).

Gold is a non-reactive metal, so it generally does not react with oxygen, water and acid.

Sodium is a highly reactive metal and reacts explosively with oxygen, water as well as acid.

Like most metals, magnesium reacts with acid to produce hydrogen gas. The reaction is vigorous in nature.

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