Question

Which gas phase reaction could probably not be studied by a pressure-jump relaxation experiment? H_2(g)+ 1/2 O-2(g) doubleheadarrow H_2O(g) N_2O_4(g) doubleheadarrow 2NO_2(g) H_2(g) + C_2H_4(g) doubleheadarrow C_2H_6(g) H_2(g)+ Br_2(g) doubleheadarrow 2HBr(g) A gaseous sample behaving ideally is expanded to doubled. The final pressure is: 1/6th the original pressure. 6 times the original pressure. 1.5 times the original pressure. 2/3 the original pressure, none of the above.
Explain too please

Answer 1

answer is (d) since both sides have same number of gaseous moles, there will be no change in the jump of pressure

P1 V1 / T1 = P2 V2 /T2

V2 = 3V1

T2 =2T1

P1 V1 /T1 = P2 x 3V1 / 2T1

P2 = 2/3 P1

OPTION-d