Question

Which statement is false?
A. Electronegativity of fluorine is maximum
B. Electron affinity of fluorine is maximum
C. Melting point of fluorine is minimum
D. Boiling point of fluorine is maximum

Answer 1

Hint: As we move down a group in halogen the electronegativity of halogen elements decreases. Thus fluorine is most electronegative among the halogens. Due to small size and high electronegativity fluorine has many unique properties.

Complete Step by Step Answer:
Halogens are generally electronegative elements. The electronegativity of an element is defined as the attraction of the nucleus of an atom towards the electrons. As we move from fluorine to iodine in the halogen group the size of the halogen increases so, the attracting power of the nucleus towards the electron decreases. Thus the electron releasing tendency increases and electronegativity decreases. Thus fluorine is the most electronegative element among halogens.

Electron affinity is defined as the energy released to accept an electron. Among halogens chlorine has the highest electron affinity. Due to the weak dipole-dipole bond in fluorine it has the lowest melting and boiling point among halogens.
Thus the correct options are B and D.

Note: Among the halogens chlorine has the highest electron affinity. The electron affinity order does not follow a regular trend like electro negativity among halogens.