Which one of the following characteristics is associated with adsorption?

• A

  $∆\mathrm{G}$ is negative but $∆\mathrm{H}$ and $∆\mathrm{S}$ are positive
• Correct answer
  B

  $∆\mathrm{G},∆\mathrm{H}$ and $∆\mathrm{S}$ all are negative
• C

  $∆\mathrm{G}$ and $∆\mathrm{H}$ are negative but $∆\mathrm{S}$ is positive
• D

  $∆\mathrm{G}$ and $∆\mathrm{S}$ are negative but $∆\mathrm{H}$ is positive

Hence, the correct answer is option: 'B'.