Question

1. Which of the following single bonds has the highest average bond dissociation enthalpy?

(A) O-O (B) S-S (C) Se-Se (D) Te-Te

2. Which of the following group 14 hydride compounds has the highest E-H bond dissociation enthalpy?

(A) Me₃C-H   (B) Me₃Si-H   (C) Me₃Ge-H   (D) Me₃Sn-H

Answer 1

Ars (1) from ub to down in Column So atractien Im Periodic table Size(sadius) o elements increates force between huclew and out most efectoons decreajes. So Bond Stremth decreases from up to down in molecules thot's why bond dissociation &nthalky also decreaes. (D) Te-Te (c) Se-Se S- S (B) A) 0-0 hay the highest bend dissociation enthel by . - So Answer will be (A). Im Gioup - 14 Hydbride , Column electronegetivity of atem decreates, why Ionic Nauture from up to down in (2) that's increates.but Size od otom that 's why Bond dissociation also increates al decreates. energy (A) Mez C-H (C) Meg Ge-H (6) Meg Si-H (D) Meg Sh-H -> So Mea C-H has the highest bond dissociation emergy. So Answer will be (A) Value o E-H bend dissociechen energy. C-H (41 Ka/mol) Si-H (318 KaAmol) Gie-H (288 KI/mel) Sn-H (251 Ku/mol)