Which of the following gas molecules have minimum value of enthalpy of chemisorption on an iron surface?

Which among the following molecules have minimum dipole moment ?

Which among the following molecules have minimum dipole moment ?

Which of the following molecules has the maximum bond enthalpy?

Adsorption is the tendency of accumulation of molecular species at the surface of solid or liquid. Depending upon the nature of bonds or forces of attraction between adsorbate and adsorbent. It is classofied between physisorption and chemisorption. Which of the following gas molecules have maximum value enthalpy of physisorption?

Adsorption is the tendency of accumulation of molecular species at the surface of solid or liquid. Depending upon the nature of bonds or forces of attraction between adsorbate and adsorbent. It is classofied between physisorption and chemisorption. Which of the following gas molecules have maximum value enthalpy of physisorption?

Which of the following is chemisorption