NEET 2010 PYQ Mock Test

For the reduction of silver ions with copper metal, the standard cell potential was found to be $+0.46\text{V}$ at $25^{\circ }\text{C}$. The value of standard Gibbs energy, $\Delta G^{\circ }$ will be ($F=96500{\text{C mol}}^{-1}$):

Which one of the following species does not exist under normal conditions?

$\text{AB}$ crystallizes in a body centred cubic lattice with edge length '$a$ ' equal to $387\text{pm}$. The distance between two oppositely charged ions in the lattice is:

For an endothermic reaction, energy of activation is $E_a$ and enthalpy of reaction is $\Delta H$ (both of these in $\text{kJ/mol}$). The minimum value of $E_a$ will be:

Which one of the following ions has electronic configuration $[\text{Ar}]3d^6$?