Answer: Charging the smoke particles and attracting them to an oppositely charged electrode.
- A Cooling the smoke stream until the suspended particles condense into a liquid
- B Charging the smoke particles and attracting them to an oppositely charged electrode
- C Bubbling the entire smoke stream through a strong mineral acid bath
- D Passing the smoke through ordinary paper filters as the sole removal step
Correct answer: B. Charging the smoke particles and attracting them to an oppositely charged electrode
Explanation: The Cottrell precipitator charges colloidal smoke particles, which are then attracted to and collected on an oppositely charged electrode, similar to electrophoresis.
A typical adsorption isotherm: x/m (mass adsorbed per gram of adsorbent) rises steeply at low pressure, then flattens into a saturation plateau as the adsorbent surface fills up.
Concept context
Explore the chemistry that happens at interfaces, from catalysts that speed up industrial reactions to colloids like milk, smoke, and gels that surround us every day.