A vessel contains ${\mathrm{N}}_2{\mathrm{O}}_4$ at certain temperature $2 \mathrm{atm}$. If the degree of dissociation of ${\mathrm{N}}_2{\mathrm{O}}_4$ at equilibrium is 0.2, final pressure of system (in atm)?

A vessel contains ${\mathrm{N}}_2{\mathrm{O}}_4$ at certain temperature  $2 \mathrm{atm}$. The degree of dissociation of ${\mathrm{N}}_2{\mathrm{O}}_4$at equilibrium is 0.2

${\mathrm{N}}_2{\mathrm{O}}_4\underset{ }{\rightleftharpoons 2{\mathrm{NO}}_2}$; the degree of dissociation of ${\mathrm{N}}_2{\mathrm{O}}_4$at equilibrium is 0.2

 2            2x

P_T = 2 + 2x

P_T = 2+2(0.2)

P_T  =2.4 atm 

Hence the correct option is (B) 2.4