MCQ
The energy is lowest for the orbital :
- ✓$4s$
- B$4p$
- C$3d$
- D$4f$
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| List $I$ (Spectral Series for Hyddrogen) | List $II$ (Spectral Region/Higher Energy State) |
| $A$. Lyman | $I$. Infrared region |
| $B$. Balmer | $II$. $UV$ region |
| $C$. Paschen | $III$. Infrared region |
| $D$. Pfund | $IV$. Visible region |
Choose the correct answer from the options given below :-
| Column $-I$ | Column $-II$ |
| $(i)$ $n-$ Butane $\to 2-$ methyl propane | $(A)$ Free redical substitution |
| $(ii)$ $C{H_4} + C{l_2} \xrightarrow{{hv}} C{H_3} + Cl$ | $(B)$ Wurtz reaction |
| $(iii)$ $R - COONa\xrightarrow{{soda - \lim e}}R - H$ | $(C)$ Isomerism |
| $(iv)$ $R - X + Na\xrightarrow{{{\text{E}}ther}}R - R$ | $(D)$ De-carboxylation |