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Questions and Answers
Which metal reacts so vigorously with oxygen that it catches fire if kept open?
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?
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?
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?
Which metal is coated with black copper oxide but does not burn?
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Which type of metal oxides react with both acids and bases to produce salts and water?
Which type of metal oxides react with both acids and bases to produce salts and water?
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