An element undergoes a reaction as show -
`X+2e^(-)``rarrX^(2-)`, energy relesed `=30.87eV//"atom"`. If the energy released ,is used to dissociate 8 gms of `H_(2)` molecules,equally into `H^(+)` and `H^(ast)`,where `H^(ast)` is an exicted state of H atoms where the electron travels in orbit whose circumference equal to four times its de Broglie's wavelength .
(a) Calculate the excited state of H
(b) Determine the least amount of X that would be required .
Given : `IE of H = 13.6 eV//"atom"`, Bond energy of `H_(2) =4.526 eV//"molecule"`.

Options

A. 1
B. 2
C. 3
D. 4

Answer

B