Question

Fill in the blanks by putting appropriate choices.During adsorption there is____in enthalpy and_____in the entropy of a system but adsorption is a spontaneous process and thus $\Delta G$ must be____. Rate of physisorption____with increase in pressure.

• A. decrease, decrease, negative, increases
• B. increase, increase, positive, decreases
• C. decrease, increase, negative, decreases
• D. increase, decrease, positive, increases

Answer 1

The correct option is A decrease, decrease, negative, increases

$\text{In adsorption enthalpy decreases because stability increases.}$

$\text{In adsorption entropy decreases because partical get attrected and togetherised.}$

$\text{AG must be negative and rate of physisorption is proportional to pressure}$