Question

Figure shows the energy levels $P,Q,R,S$ and $G$ of an atom where $G$ is the ground state. A red line in the emission spectrum of the atom can be obtained by an energy level change from $Q$ to $S$. A blue line can be obtained by following energy level change

• A. $P$ to $Q$
• B. $Q$ to $P$
• C. $R$ to $S$
• D. $R$ to $G$

Answer 1

The correct option is A $P$ to $Q$

If $E$ is the energy radiated in transition then $E_{R\to G}>E_{Q\to S}>E_{R\to S}>E_{Q\to R}>E_{P\to Q}$
For getting blue line energy radiated should be maximum
$(E\propto \frac{1}{\lambda })$. Hence (d) is the correct option.