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Q.

When Magnesium reacts with cold water it forms:

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a

MgO + H2

b

Mg(OH)2 + H2

c

Magnesium does not react with cold water

d

MgO2 + H2

answer is D.

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Detailed Solution

When magnesium is added to cold water it becomes coated with magnesium hydroxide which is insoluble and prevents water from coming into contact with other magnesium atoms. So, there is no reaction between cold water and magnesium.

Hence, Magnesium does not react with cold water.

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