true :
explanation:
generally surface area char coal
surface area of char coal = 1g = 1/12 mol
                                        Â
= 1 x 6.023 x 10^23 / 12 molecules
                                         Â
= 5.019 x 10^22 molecules
so capacity = (16.2e -20 m^2/ molecule ) x 5.019 x 10^22
molecules
                 Â
= 8131 m^2
it is more value than 850 m^2 . so the above statement is
true
