NEETChemistrySurface Chemistry
What happens to dihydrogen molecules on the surface of activated charcoal during adsorption?
Options
- AThey dissociate to form hydrogen atoms.
- BThey remain unchanged.
- CThey form strong covalent bonds.
- DThey become weaker.
Correct answer
A. They dissociate to form hydrogen atoms.
Step-by-step solution
The paragraph states that dihydrogen molecules first adsorb on nickel by van der Waals’ forces and then dissociate to form hydrogen atoms, which are held on the surface by chemisorption.