NEET UG Basic Concepts & Atomic Structure – Topic Test
NEET UG Basic Concepts & Atomic Structure – Topic Test is an online topic test in the NEET UG pattern, covering Basic Concepts & Atomic Structure. 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 |
|---|---|
| Basic Concepts & Atomic Structure | 30 |
Difficulty: 15 medium · 15 hard
Basic Concepts & Atomic Structure MCQ questions with answers
The first 3 of 30 questions. Unlock the series for the rest, each with a solution.
Q1. Three of the following concentration terms are independent of temperature while one is not. Which one is temperature dependent?
निम्नलिखित सांद्रता पदों में से तीन ताप से स्वतंत्र हैं जबकि एक नहीं। कौन-सा ताप पर निर्भर है?
- A. Molarity / मोलरता
- B. Mole fraction / मोल प्रभाज
- C. Mass percent / द्रव्यमान प्रतिशत
- D. Molality / मोललता
Solution
Molality, mole fraction and mass percent are all based on mass (temperature independent), whereas molarity involves the volume of solution, which changes with temperature.
मोललता, मोल प्रभाज तथा द्रव्यमान प्रतिशत सभी द्रव्यमान पर आधारित हैं (ताप से स्वतंत्र), जबकि मोलरता में विलयन का आयतन सम्मिलित होता है, जो ताप के साथ बदलता है।
Q2. According to Bohr's model, the angular momentum of the electron in the second orbit (n = 2) of the hydrogen atom is:
बोर के मॉडल के अनुसार, हाइड्रोजन परमाणु की दूसरी कक्षा (n = 2) में इलेक्ट्रॉन का कोणीय संवेग है:
- A. h/2π
- B. h/π
- C. h/4π
- D. 2h/π
Solution
Bohr's quantisation condition gives angular momentum mvr = nh/2π. For n = 2 this equals 2h/2π = h/π.
बोर की क्वांटमीकरण शर्त कोणीय संवेग mvr = nh/2π देती है। n = 2 के लिए यह 2h/2π = h/π के बराबर होता है।
Q3. Following the 2019 revision of the SI base units, the Avogadro constant was assigned a fixed exact value of
SI मूल इकाइयों के 2019 के संशोधन के बाद, आवोगाद्रो स्थिरांक को एक निश्चित यथार्थ मान दिया गया जो है
- A. 6.02214076 × 10²³ mol⁻¹
- B. 6.0221367 × 10²³ mol⁻¹
- C. 6.022 × 10²³ mol⁻¹
- D. 6.023 × 10²³ mol⁻¹
Solution
Since 20 May 2019 the mole is defined so that the Avogadro constant is exactly 6.02214076 × 10²³ mol⁻¹; the other values are earlier approximate or rounded figures.
20 मई 2019 से मोल को इस प्रकार परिभाषित किया गया है कि आवोगाद्रो स्थिरांक यथार्थतः 6.02214076 × 10²³ mol⁻¹ है; अन्य मान पहले के सन्निकट या पूर्णांकित आँकड़े हैं।
Frequently asked questions
How many questions are in the NEET UG Basic Concepts & Atomic Structure – Topic Test?
30 questions for 30 marks, to be answered in 30 minutes.
Is there negative marking in the NEET UG Basic Concepts & Atomic Structure – Topic Test?
Yes — 0.25 marks are deducted for each wrong answer, as in the real exam pattern.
Which topics does the NEET UG Basic Concepts & Atomic Structure – Topic Test cover?
Basic Concepts & Atomic Structure (30 questions).
Is the NEET UG Basic Concepts & Atomic Structure – Topic 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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