Resistance of a conductivity cell (cell constant 129 m^-1) filled with 74.5 ppm solution of KCl is $100\Omega$  (labeled as solution 1). When the same cell is filled with KCl solution of 149 ppm, the resistance is $50\Omega$  (labeled as solution 2). The ratio of molar conductivity of solution 1 and solution 2 is i.e. $\frac{{\wedge }_1}{{\wedge }_2}=x*10^{-3}.$  The value of x is________. (Nearest integer)

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)