JEE Main levelSingle correct optionDifficulty 2 of 3sc021
Which of the following is an example of chemisorption?
ACOX2 on activated charcoal at room temperature
BNitrogen on iron at 83K
CArgon on charcoal at 100K
DHydrogen on finely divided nickel
Answer: D
Hydrogen forms Ni-H bonds on nickel, so it is chemisorbed. Nitrogen on iron at 83K is physisorption (chemisorption occurs only at about 773K), and argon or COX2 on charcoal are physisorbed.