Short Answer TypeWrite one difference in each of the following :
Homogeneous catalysis and Heterogeneous catalysis
Homogeneous catalysis: When the reactants and the catalyst are in same phase (i.e., Liquid or gas), the process is said to be homogeneous catalysis. For example, Oxidation of sulphur dioxide into sulphur trioxide with dioxygen in presence of oxides of nitrogen as the catalyst in the process.
2SO2(g) + O2(g)→ NO(g) +2SO3(g)
Heterogeneous catalysis: The catalytic process in which the reactant and the catalyst are in different phase is known as heterogeneous.For example Oxidation of sulphur dioxide into sulphur trioxide in the presence of Pt.
2SO2(g) + pt(s)→ 2SO3 (g)
Following data are obtained for the reaction :
N2O5 → 2NO2 + ½O2
| t/s | 0 | 300 | 600 |
| [N2O5]/mol L–1 | 1.6 × 10–2 | 0.8 × 10–2 | 0.4 × 10–2 |
(a) Show that it follows first order reaction.
(b) Calculate the half-life.
(Given log 2 = 0.3010 log 4 = 0.6021)
Out of PbS and PbCO3 (ores of lead), which one is concentrated by froth flotation process preferably?
Account for the following :
The lowest oxide of transition metal is basic whereas the highest oxide is
amphoteric or acidic.
Switch
