Consider the hydrated ions of Ti²⁺, V²⁺, Ti³⁺, and Sc³⁺. The correct order of their spin-only magnetic moments is :

During the change of O₂ to O₂^- , the incoming electron goes to the orbital :

A bacterial infection in an internal wound grows as N'(t) = N₀ exp(t), where the time t is in hours. A does of antibiotic, taken orally, needs 1 hour to reach the wound. Once it reaches there, the bacterial population goes down as $${{dN} \over {dt}} = - 5{N^2}$$. What will be the plot of $${{{N_0}} \over N}$$ vs. t after 1 hour?

Ethylamine (C₂H₅NH₂) can be obtained from N-ethylphatalimide on treatment with :