Question

Question 3 0.5 pts Which of the following substances is expected to have the highest melting point? 0 H₂O осна H2S ooo O CO2 Ne

Answer 1

Stronger the intermolecular forces between the atoms in a molecule , higher will be the melting point.

H2O molecule have strongest intermolecular forces. Hence H2O will have highest melting point.

The forces which mediate the interaction between the molecules are known as intermolecular forces. Intermolecular forces are of 3 types:- 1. Hydrogen bonding -- When hydrogen is bonded to a highly elecrtonegative atom like Flourine , oxygen or nitrogen then it forms a weak bond known as hydrogen bond. Dipole dipole forces -- In polar molecules negative end of one molecule attracts the positive end of the other molecule. It is called Dipole forces. It is present only in polar molecules. Dispersion forces -- It arises when electrons in an atom occupies positions that results in temporary Dipoles. It is present in nonpolar molecule.

Answer -- H2O