$N_2{O}_{5\left(g\right)}\to 2N{O}_{2\left(g\right)}+\frac{1}{2}{O}_{2\left(g\right)}$

In the above first order reaction the initial concentration of N₂O₅ is 2.40 * 10^-2 mol L^-1 at 318 K. The concentration of N₂O₅ after 1 hours was 1.60 * 10^-2 mol L^-1. The rate constant of the reaction at 318 K is__________* 10^-3 min^-1. (Nearest integer)

[Given : log3 = 0.477, log5 = 0.699]

At 25°C the standard emf of cell having reactions involving two electrons change is found to be 0.295 V. The equilibrium constant of the reaction is :

Kindly consider the following 

Which of the following will not give ether as product :-

Which is most reactive towards electrophilic aromatic substitution reaction :-

Which one of the following ions is the most stable in aqueous solution ?

(At. No. Ti = 22, V = 23, Cr = 24, Mn=25)