Question

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

• A. Gold generally does not react with oxygen, water and acid.
• B. Sodium reacts explosively with water and acid.
• C. Iron does not react with oxygen and water.
• D. Magnesium reacts vigorously with acid and produces hydrogen gas.

Answer 1

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.