When Mg metal is treated with hot water, it starts floating on the surface of the water. The reason for its…

When Mg metal is treated with hot water, it starts floating on the surface of the water. The reason for its different behaviour is :
  1. Mg is a lighter element than water.
  2. Mg reacts with water to produce H2 gas which helps in floating.
  3. Mg reacts with water to produce N2 gas which helps in floating.
  4. Mg reacts with water to form CO2 gas which helps in floating.

Solution

Mg reacts with water to produce H2 gas which helps in floating.

Asked in: CBSE

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