6
When $\ce{Mg}$ metal is treated with hot water, it starts floating on the surface of the water. The reason for its different behaviour is :
- (a)$\ce{Mg}$ is a lighter element than water.
- (b)$\ce{Mg}$ reacts with water to produce $\ce{H2}$ gas which helps in floating.
- (c)$\ce{Mg}$ reacts with water to produce $\ce{N2}$ gas which helps in floating.
- (d)$\ce{Mg}$ reacts with water to form $\ce{CO2}$ gas which helps in floating.
Show SolutionHide Solution↓
(B) / Mg reacts with water to produce $\ce{H2}$ gas which helps in floating. (1 Mark)