GENERAL KNOWLEDGE

Detailed explanation-1: -BUT, the fluorine nucleus has 9 protons whereas the carbon nucleus has only 6. Allowing for the shielding effect of the 1s electrons, the bonding pair feels a net pull of about 4+ from the carbon, but about 7+ from the fluorine.

Detailed explanation-2: -If atoms gain electrons, they become negative ions, or anions. Consider the example of fluorine (see Figure below). A fluorine atom has nine protons and nine electrons, so it is electrically neutral. If a fluorine atom gains an electron, it becomes a fluoride ion with an electric charge of-1.

Detailed explanation-3: -Dipole-dipole forces One reason why CH3F has a higher boiling point (-84 °C) than CF4 (-128 °C) is that CF3H has a permanent dipole moment, while CF4 does not.

Detailed explanation-4: -Fluorine gas is a gas that has London dispersion forces between its molecules, which is why the substance is gaseous at room temperature.

Detailed explanation-5: -Based on the asymmetrical structure of the molecule, this compound is polar. Dipole-dipole interaction then exists between polar molecules. Therefore, the strongest intermolecular force in nitrogen trifluoride is dipole-dipole interaction.