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प्रश्न
Which one of the following metals does not react with cold water?
पर्याय
Sodium
Potassium
Calcium
Magnesium
MCQ
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उत्तर
Magnesium
Explanation:
Magnesium does not react with cold water. In the reactivity series, magnesium is less reactive than sodium, potassium, and calcium. While it is unreactive toward cold water, it reacts with hot water to form magnesium hydroxide and hydrogen gas. It also reacts more vigorously with steam to form magnesium oxide.
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