The reaction 2N2O5 → 4NO2+O2 shows an increase in concentration of NO2 by 20 x 10-3 mol litre–1 in 5 second calculate the rate of appearance of NO2
(a) 2 x 10-3 mol litre-1 sec-1
(b) 4 x 10-3 mol litre-1 sec-1
(c) 1 x 10-3 mol litre-1 sec-1
(d) None of these