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.
Whats the positive and negatives of solar energy? The positive side is that solar energy provides a clean, constant source of energy that can be used to generate electricity and heat. The negative side is that at the current state of technology, it cannot provide enough of either to meet our energy demands.