Given $K_{net}=\frac{K_1{K}_2}{K_3}$  when $E_{a_1}$ =40 kJ/mol

  $E_{a_1}$ =50 kJ/mol. = $E_{a_1}$ 60 kJ/mol

Calculate value of (E_a)_net in kJ/mol

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)