Which one of the following doesn't react with water even at red hot temperature?
Correct answer: A. Be
- A. Be
- B. Mg
- C. None of these
- D. Ba
Explanation
The correct answer is Beryllium (Be). Beryllium does not react with water even at red hot temperature due to the formation of a protective oxide layer on the surface. Magnesium (Mg) reacts with water, albeit slowly at room temperature and more vigorously at high temperatures. Barium (Ba) also reacts vigorously with water at room temperature. Therefore, options Mg and Ba are incorrect.
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About Reactions of Group II Elements
Group II reactions cover the behaviour of beryllium, magnesium, calcium, strontium and barium with water, oxygen, halogens, acids and nitrogen. The trends in reactivity, hydroxide solubility and basicity, along with the thermal decomposition of carbonates and nitrates, depend on increasing atomic size down the group.
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