JEE Mains · Chemistry · STD 11 - 2. structure of atom
The electron in the hydrogen atom undergoes transition from higher orbitals to orbital of radius \(211.6\, pm\). This transition is associated with
- A Lyman series
- B Balmer series
- C Paschen series
- D Brackett series
Answer & Solution
Correct Answer
(B) Balmer series
Step-by-step Solution
Detailed explanation
\(r = 0.529 \times \frac{{{n^2}}}{Z}\) \(r = 211.6\,pm = 2.11\,\mathop A\limits^o \) \( \Rightarrow 0.529 \times \frac{{{n^2}}}{Z} = 2.11\,\mathop A\limits^o \) \(n = 2\) (Balmer series)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- The titration curve of weak acid vs. strong base with phenolphthalein as indictor) is shown below. The \(K _{\text {phenolphthalein }}=4 \times 10^{-10}\). Given: \(\log 2=0.3\) The number of following statements which is/are correct about phenolphthalein is \(.....\). \(A\). It can be used as an indicator for the titration of weak acid with weak base. \(B\). It begins to change colour at \(pH =8.4\) \(C\). It is a weak organic base \(D\). It is colourless in acidic medium
JEE Mains 2023 Hard - Match List\(-I\) with List\(-II.\)
Choose the correct answer from the options given below:List\(-I\) List\(-II\) \((a)\) \(Ne _{2}\) \((i)\) \(1\) \((b)\) \(N _{2}\) \((ii)\) \(2\) \((c)\) \(F _{2}\) \((iii)\) \(0\) \((d)\) \(O _{2}\) \((iv)\) \(3\) JEE Mains 2021 Easy - The specific conductance of \(0.0025\,M\) acetic acid is \(5 \times 10^{-5}\,S\,cm ^{-1}\) at a certain temperature. The dissociation constant of acetic acid is \(......\,10^{-7}\). (Nearest integer) Consider limiting molar conductivity of \(CH _3 COOH\) as \(400\,S\,cm ^2\,mol ^{-1}\)JEE Mains 2023 Medium
- Based on the data given below :
\(\begin{array}{ll}\mathrm{E}_{\mathrm{Cr}_2 \mathrm{O}_7^{2-} / \mathrm{Cr}^{3+}}^{\circ}=1.33 \mathrm{~V} & \mathrm{E}_{\mathrm{Cl}_2 / \mathrm{Cl}^{(-)}}^{\circ}=1.36 \mathrm{~V} \\ \mathrm{E}_{\mathrm{MnO}_4^{-} / \mathrm{Mn}^{2+}}^{\circ}=1.51 \mathrm{~V} & \mathrm{E}_{\mathrm{Cr}^{3+} / \mathrm{Cr}}^{\circ}=-0.74 \mathrm{~V}\end{array}\)
the strongest reducing agent is :JEE Mains 2025 Easy - It is true that :JEE Mains 2020 Medium
- Which one of the following metals forms interstitial hydride easily ?JEE Mains 2021 Medium
More PYQs from JEE Mains
- The number of optical isomers in following compound is _______.
JEE Mains 2024 Medium - Two planets have masses \(M\) and \(16\, M\) and their radii are \(a\) and \(2\, a\) respectively. The separation between the centres of the planets is \(10\, a.\) A body of mass \(m\) is fired from the surface of the larger planet towards the smaller planet along the line joining their centres. For the body to be able to reach at the surface of smaller planet, the minimum firing speed needed isJEE Mains 2020 Hard
- The volume (in \(mL\) ) of \(0.1\, N\) \(NaOH\) required to neutralise \(10\, mL\) of \(0.1\, N\) phosphinic acid is........JEE Mains 2020 Hard
- Consider \(\mathrm{I}_1\) and \(\mathrm{I}_2\) are the currents flowing simultaneously in two nearby coils 1 & 2, respectively. If \(\mathrm{L}_1=\) self inductance of coil \(1, \mathrm{M}_{12}=\) mutual inductance of coil 1 with respect to coil 2, then the value of induced emf in coil 1 will be ________.JEE Mains 2025 Medium
- Let \(\mathrm{f}(\mathrm{x})\) be a cubic polynomial with \(\mathrm{f}(1)=-10\) \(\mathrm{f}(-1)=6\), and has a local minima at \(\mathrm{x}=1\), and \(f^{\prime}(x)\) has a local minima at \(x=-1\). Then \(f(3)\) is equal to .... .JEE Mains 2021 Hard
- For the following reaction at \(50°\)C and at \(2\) atm pressure,
\(2N_2O_5(g) \rightleftharpoons 2N_2O_4(g)+O_2(g)\)
\(N_2O_5\) is \(50\%\) dissociated.
The magnitude of standard free energy change at this temperature is \(x\).
\(x=\) ______ J mol\(^{-1}\) [Nearest integer].
Given: \(R=8.314\) J mol\(^{-1}\) K\(^{-1}\), \(\log 2=0.30\), \(\log 3=0.48\), \(\ln 10=2.303\), \(°C+273=K\)JEE Mains 2026 Hard