Metal Reactions with Air

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Questions and Answers

Which metal reacts so vigorously with oxygen that it catches fire if kept open?

  • Mg
  • Na
  • K (correct)
  • Al

Which metals are covered with a thin layer of oxide that prevents further oxidation?

  • Na and K
  • Au and Ag
  • Mg, Al, Zn, and Pb (correct)
  • Fe and Cu

Which metal does not burn on heating but its iron fillings burn vigorously?

  • K
  • Na
  • Mg
  • Fe (correct)

Which metal is coated with black copper oxide but does not burn?

<p>Cu (C)</p> Signup and view all the answers

Which type of metal oxides react with both acids and bases to produce salts and water?

<p>Amphoteric oxides (A)</p> Signup and view all the answers

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