I/GCSE Chemistry Question Analysis Topic: Chemistry - Short Questions
1) How do antiseptics differ from disinfectants? Name a substance which can be used as a disinfectant as well as an antiseptic.
2) Why halogens have maximum negative electron gain enthalpy?
1) Disinfectants are used for drainage systems, floor cleaning, etc., while antiseptics are administered to living tissues like wounds, cuts, ulcers, and other skin surfaces.
For instance, 1% phenol solution is used as a disinfectant and iodine tincture is used as an antiseptic. It is possible to use 0.2% phenol as an antiseptic and a disinfectant.
2) In terms of gaining electrons and obtaining noble gas electrical configuration, halogens are the elements that are closest to the noble gases.
The amount of energy released when an electron is added to the neutral gaseous atom is known as the electron gain enthalpy.
Due to their small size and effective nuclear charge, halogens have a great propensity to receive electrons, giving them the highest negative electron gain enthalpy (since energy is dissipated during the process) in their corresponding periods of the periodic table.
End of analysis. Great!