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prodeepbiswas
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Asked: 2021-06-09T10:39:49+00:00 In:

Which among the following statements is incorrect for magnesium metal ?

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Poll Results

0%(a) It burns in oxygen with a dazzling white flame.
100%(b) It reacts with cold water to form magnesium oxide and evolves hydrogen gas ( 9 voters )
0%(c) It reacts with hot water to form magnesium hydroxide and evolves hydrogen gas.
0%(d) It reacts with steam to form magnesium hydroxide and evolves hydrogen gas.
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    1. Best Answer

      [B] It reacts with cold water to form magnesium oxide and evolves hydrogen gas.
      Magnesium metal never reacts with cold water but reacts with both hot water and steam to form magnesium hydroxide and hydrogen gas.
      Mg(s) + H₂O(l) → Mg(OH)₂ + H₂(g) ↑

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    2. [B] It reacts with cold water to form magnesium oxide and evolves hydrogen gas
      Magnesium when reacts with water gives magnesium hydroxide and hydrogen gas and not magnesium oxide.

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    3. (b) It reacts with cold water to form magnesium oxide and evolves hydrogen gas

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