MHT CET Chemistry Question (2026) — Solution

Step-by-step solution

The energy of an electron in the nth stationary state of a hydrogen atom is given by the expression: E_n = -R_H ( 1 n^2 ) where R_H is the Rydberg constant for energy, which is equal to 2.18 10^ -18 J. For n = 2: E_2 = -2.18 10^ -18 ( 1 2^2 ) J E_2 = - 2.18 10^ -18 4 J E_2 = -0.545 10^ -18 J E_2 = -5.45 10^ -19 J Answer: -5.45 10^ -19 J