NEET UG Modern Physics & Electronics: Atoms – Chapter Test
NEET UG Modern Physics & Electronics: Atoms – Chapter Test is an online chapter test in the NEET UG pattern, covering Modern Physics & Electronics. Attempt it on SeatBeat with a timer like the real exam, then see a detailed solution for every question and your score and weak-topic analysis.
Topics in this test
| Topic | Questions |
|---|---|
| Modern Physics & Electronics | 20 |
Difficulty: 7 medium · 13 hard
Atoms MCQ questions with answers
The first 3 of 20 questions. Unlock the series for the rest, each with a solution.
Q1. The radius of the first (ground-state) Bohr orbit of the hydrogen atom is approximately:
हाइड्रोजन परमाणु की प्रथम (निम्नतम-अवस्था) बोर कक्षा की त्रिज्या लगभग है:
- A. 0.53 Å
- B. 53 Å
- C. 5.3 Å
- D. 0.53 × 10⁻¹⁵ m
Solution
The Bohr radius a₀ is about 0.53 Å (5.3 × 10⁻¹¹ m). The other values are off by orders of magnitude (atomic nucleus scale or far too large).
बोर त्रिज्या a₀ लगभग 0.53 Å (5.3 × 10⁻¹¹ m) होती है। शेष मान परिमाण की कोटियों (परमाणु नाभिक पैमाना अथवा अत्यधिक बड़े) से भिन्न हैं।
Q2. Match the hydrogen spectral series in List I with the lower principal quantum number (final level) of the transition in List II. List I: A. Lyman series B. Balmer series C. Paschen series D. Brackett series List II: 1. n = 1 2. n = 2 3. n = 3 4. n = 4 Select the correct matching.
सूची I में दी गई हाइड्रोजन वर्णक्रमीय श्रेणियों का सूची II में दिए गए संक्रमण के निम्नतर मुख्य क्वांटम संख्या (अंतिम स्तर) से मिलान कीजिए। सूची I: A. लाइमन श्रेणी B. बामर श्रेणी C. पाश्चन श्रेणी D. ब्रैकेट श्रेणी सूची II: 1. n = 1 2. n = 2 3. n = 3 4. n = 4 सही मिलान चुनिए।
- A. A-1, B-2, C-3, D-4
- B. A-2, B-1, C-3, D-4
- C. A-1, B-2, C-4, D-3
- D. A-4, B-3, C-2, D-1
Solution
Each series is named by its common lower level: Lyman terminates at n = 1, Balmer at n = 2, Paschen at n = 3 and Brackett at n = 4.
प्रत्येक श्रेणी अपने सामान्य निम्नतर स्तर के नाम पर है: लाइमन n = 1 पर समाप्त होती है, बामर n = 2 पर, पाश्चन n = 3 पर और ब्रैकेट n = 4 पर।
Q3. The energy required to ionize a hydrogen atom from its ground state is:
हाइड्रोजन परमाणु को उसकी निम्नतम अवस्था से आयनित करने के लिए आवश्यक ऊर्जा है:
- A. 10.2 eV
- B. 13.6 eV
- C. 27.2 eV
- D. 3.4 eV
Solution
The ground-state energy is −13.6 eV; removing the electron to n = ∞ (E = 0) therefore requires 13.6 eV. 3.4 eV is the ionization energy from the first excited state, not the ground state.
निम्नतम-अवस्था ऊर्जा −13.6 eV है; इलेक्ट्रॉन को n = ∞ (E = 0) तक हटाने के लिए अतः 13.6 eV की आवश्यकता होती है। 3.4 eV प्रथम उत्तेजित अवस्था से आयनन ऊर्जा है, न कि निम्नतम अवस्था से।
Frequently asked questions
How many questions are in the NEET UG Modern Physics & Electronics: Atoms – Chapter Test?
20 questions for 20 marks, to be answered in 20 minutes.
Is there negative marking in the NEET UG Modern Physics & Electronics: Atoms – Chapter Test?
Yes — 0.25 marks are deducted for each wrong answer, as in the real exam pattern.
Which topics does the NEET UG Modern Physics & Electronics: Atoms – Chapter Test cover?
Modern Physics & Electronics (20 questions).
Is the NEET UG Modern Physics & Electronics: Atoms – Chapter Test free?
It is part of the NEET UG 2027 Mock Test Series (134 tests, ₹299). You can first try Biology in Human Welfare – Topic Test for free.
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