Polarity and Boiling Point: The polarity of the molecules determines the forces of attraction between the molecules in the liquid state. Polar molecules are attracted by the opposite charge effect (the positive end of one molecule is attracted to the negative end of another molecule.
The five disadvantages of solar power. It's intermittent. Solar energy is only available when the sun is shining. It's low efficiency. It requires large areas of land. It's not completely free of environmental impact. Ultrapure polysilicon is now scarce. It's high cost.
Even though there are equipment and devices required for the generation of solar energy from the rays of sun, the cost is very low as compared to what we spend on fulfilling our energy needs. One of the advantages of solar energy is that it can be used in the rural and remote areas as well. In these places, it is usually very expensive to deploy the electricity power grids and solar energy can be generated in ample amount here.