Which of the following metal react vigorously with cold water?
A
Sodium (Na)
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B
Magnesium (Mg)
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C
Aluminium (Al)
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D
Zinc (Zn)
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Solution
The correct option is A Sodium (Na) Metals such as potassium and sodium react violently with cold water. The reaction is so violent and exothermic that the evolved hydrogen immediately catches fire.
Magnesium, aluminium and zinc does not react with cold water.