Surface Chemistry Flashcards
1
Q
Water vapours are absorbed by ___________________ but adsorbed by _______________.
A
anhydrous calcium chloride
silica gel
2
Q
Enthalpy of physical adsorption?
of chemical adsorption?
A
20-40kJ
80-240kJ
3
Q
Freundlich gave the adsorption isotherm in
A
1909
4
Q
Probable range of 1/n
A
0.t to 0.5
5
Q
____________ have the property of adsorbing some dyes like eosin, fluorescein, etc.
A
silver halides
6
Q
Who suggested the term catalyst
A
Berzelius
7
Q
Promoter for Haber’s process?
A
Molybdenom
8
Q
hydrogenation reaction, the catalytic activity increases from Group 5 to Group 11 metals with maximum activity being shown by groups ____ elements
A
7-9
9
Q
The first enzyme was discovered in
pH for enzymes
A
1969
5-7
