Pick out the wrong statement. Generally for physical adsorption, a gas of________________?
Correct answer: D. None of these
- A. Higher molecular weight is adsorbed in preference to a gas of low molecular weight
- B. High critical temperature is adsorbed in preference to a gas of low critical temperature
- C. Low volatility is adsorbed in preference to a gas of high volatility
- D. None of these
Explanation
Physical adsorption generally favours gases with higher molecular weight, higher critical temperature and lower volatility because these are more readily condensable and interact more strongly with the adsorbent. Thus none of statements A to C is wrong.
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