What is meant by the promoter and the poison of a catalyst? Give one example of each.
Surface Chemistry
Original Khojo Papers practice question — not from a past board paper.
The Tyndall effect is the scattering of a beam of light by the dispersed particles of a colloid, which makes the path of the beam visible. It distinguishes a colloidal solution from a true solution, whose particles are too small to scatter light appreciably.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
It is why a beam of sunlight is visible in a dusty room.
From the same topic and chapter, at a similar level.
What is meant by the promoter and the poison of a catalyst? Give one example of each.
Surface Chemistry
What is an emulsion? Name the two types with an example of each.
Surface Chemistry
Distinguish between physisorption and chemisorption.
Surface Chemistry
Distinguish between Schottky and Frenkel defects and state the effect of each on density.
Solid State
What is the van't Hoff factor, and what values does it take for sodium chloride and for acetic acid in benzene?
Solutions
Name the four colligative properties and state what colligative means.
Solutions