Which of the following compounds does not react with water or steam to liberate hydrogen?
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Carbon
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Sodium
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Magnesium
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Lead
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Calcium
A
Correct answer
Explanation
All non metals do not react with water to form either metal oxides or metal hydroxides. Whether water is in the form of cold water, hot water or steam, all the non metals will remain unresponsive to the action of water. The reason for this is the typical electronic configuration of non metals. Non metals are electronegative are unable to break the bond between H and O in water. Non metals cannot reduce hydrogen by donating electrons. As carbon is a non metal, it will not react with water or steam.