If ${\left[Cu{\left(H_{2}O\right)}_4\right]}^{2+}$ absorbs a light of wavelength 600nm d-d transition, then the value of octahedral crystal field splitting energy for ${\left[Cu{\left(H_{2}O\right)}_6\right]}^{2+}$  will be_________* 10^-21J. (Nearest Integer)

 (Given: h = 6.63 * 10^-34 Js and c = 3.08 * 10⁸ ms^-1)

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)