MCQ
The electron in the hydrogen atom undergoes transition from higher orbitals to orbital of radius $211.6\, pm$. This transition is associated with
- ALyman series
- ✓Balmer series
- CPaschen series
- DBrackett series
✓
Answer
Correct option: B.
Balmer series
b
$r = 0.529 \times \frac{{{n^2}}}{Z}$
$r = 0.529 \times \frac{{{n^2}}}{Z}$
$r = 211.6\,pm = 2.11\,\mathop A\limits^o $
$ \Rightarrow 0.529 \times \frac{{{n^2}}}{Z} = 2.11\,\mathop A\limits^o $
$n = 2$ (Balmer series)
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
In the mixture of conc. ${H_2}S{O_4}$ and $HN{O_3}$the nitrating species is
→What will be the formula of $'M'$ nitrate?
→Which of the following pairs of compounds are functional isomers ?
When $2-$ butyne is treated with $H_2/$ Lindlar's catalyst, compound $X$ is produced as the major product and when treated with $Na/liq.$ $NH_3$ it produces $Y$ as the major product. Which of the following statements is correct?
→Two hybrid orbitals have a bond angle of $120^o$. The percentage of $s-$ character in the hybrid orbital is nearly ............. $\%$
→In which of the following compounds, is the oxidation number of sulphur is the least?
A xenon compound $'A'$ upon partial hydrolysis gives $XeO _{2} F _{2}$. The number of lone pair of electrons present in compound $A$ is ....... . (Round off to the Nearest integer)
→Benzene is obtained from
Acetylene molecule has carbon in
Which of the following pairs of molecules is isoelectronic as-well as iso structrural