A solid is completely submerged in a particular liquid and floats at a constant level. when the temperature of the liquid in the solid is raised, the liquid expands more than the solid. will this make the solid rise upward remain floating or sink explained

The density will be less for the liquid, so more will be displaced to float the solid. However, the liquid rises as it expands, lifting the solid. So the solid goes down, and the liquid goes up.

Now if the density of the liquid becomes less than the solid's density, the solid sinks in the rising liquid.