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Question

A metal which reacts with cold water vigorously producing hydrogen is:

A
zinc
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B
tungsten
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C
sodium
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D
mercury
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Solution

The correct option is C sodium
Metals like zinc, tungsten, and mercury do not readily react with cold water. On the other hand, alkali metals are the most reactive metals in the periodic table so, when sodium is brought in contact with cold water, it reacts vigorously. The reaction is violent and exothermic.
2Na(s)+2H2O(l)2NaOH(aq)+H2(g)
So the correct option is C.


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