MCQ
The energy of an electron in ${n^{th}}$ orbit of hydrogen atom is
- A$\frac{{13.6}}{{{n^4}}}\,eV$
- B$\frac{{13.6}}{{{n^3}}}\,eV$
- ✓$\frac{{13.6}}{{{n^2}}}\,eV$
- D$\frac{{13.6}}{n}\,eV$
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| List $I$ Element detected | List $II$ Reagent used/Product formed |
| $A$ Nitrogen | $I.$ $Na _2\left[ Fe ( CN )_5 NO \right]$ |
| $B$ Sulphur | $II.$ $AgNO _3$ |
| $C$ Phosphorous | $III.$ $Fe _4\left[ Fe ( CN )_6\right]_3$ |
| $D$ Halogen | $IV.$ $\left( NH _4\right)_2 MoO _4$ |
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