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)
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.
The lowest oxide of transition metal is basic because of some valence electron are not involved in bonding thus act as a base due to the availability of free electrons. The highest oxide of transition metal electrons of metal is involved in the bonding. Therefore, these electrons are not available for donation. Hence, they are acidic in nature.