Question

Does size not affect the lewis base ch of trichlorides of oxygen family

• A. Yes
• B. No

Answer 1

Answer: (B)

No

Answer 2

Lewis basicity refers to the ability of a species to donate an electron pair. In the chlorides of Group 16 elements (e.g., $SCl_2$, $SeCl_2$, $TeCl_2$), the central atom (S, Se, Te) has lone pairs available for donation. Atomic size is a significant factor influencing Lewis basicity. As the atomic size of the central atom increases down Group 16 (O < S < Se < Te), the valence electrons, including lone pairs, are held less tightly and are more diffuse, making them more readily available for donation. Therefore, Lewis basicity generally increases with increasing atomic size. The statement "size does not affect Lewis basicity" is false. Consequently, the answer to the question "Does size not affect..." is No.