Write one difference in each of the following :
Homogeneous catalysis and Heterogeneous catalysis
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)
Write the principle of the method used for the refining of germanium.
Zone refining method is used for the refining of germanium. The principle states that the impurities are more soluble in the melt than in the solid state of the metal.
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.