The number of orbitals associated with quantum number n = 5, m_s = +$${1 \over 2}$$ is :

What is the product of following reaction ?

Consider the following reaction :


The product 'X' is used :

Given that the standard potentials (E^o) of Cu²⁺/Cu and Cu⁺/Cu are 0.34 V and 0.522 V respectively, the E^o of Cu²⁺/Cu⁺ :