What Are the Fundamental Laws and Easy Examples in Basic Chemistry?
This page presents Some Basic Concepts in MCQ for the NEET Chemistry syllabus. Practice high-yield multiple-choice questions, sharpen your fundamentals, and build exam confidence. All MCQs mirror NEET standards, with instant answer keys and explanations. Use this free Vedantu resource to boost accuracy and master core chapter concepts.
What are MCQs for Some Basic Concepts in MCQ?
MCQs for Some Basic Concepts in MCQ test your understanding of basic chemical principles, mole concepts, laws of combinations, and key calculations. These questions help reinforce fundamental chemistry ideas needed for the NEET exam. Practicing these MCQs improves speed, error spotting, and NEET exam readiness.
Why Practice NEET MCQs?
Practicing NEET MCQs gives real-exam experience, highlights weak spots, and enables concept revision. Attempting MCQs from chapters like Some Basic Concepts in MCQ trains you for time management and boosts confidence for NEET Chemistry. Repeated MCQ practice also increases your NEET score accuracy.
Some Basic Concepts in MCQ: NEET Practice Questions
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10 dm3 of N2 gas and 10 dm3 of gas X at the same temperature have the same number of molecules. Identify gas X.
A. CO
B. H2
C. CO2
D. NO
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Which of the following is equal to 1 gram molecule of benzene (C6H6)?
A. 10 g C6H6
B. 70 g C6H6
C. 72 g C6H6
D. 78 g C6H6
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Under identical conditions, equal masses of nitrogen and oxygen are taken. What is the ratio of their volumes?
A. 7 : 8
B. 9 : 2
C. 5 : 6
D. 3 : 5
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The unit “amu” has been most recently replaced by:
A. u
B. mol
C. g
D. kg
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According to Avogadro’s law, at constant temperature and pressure, volume of a gas is proportional to:
A. 1/P
B. n
C. T
D. P
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Which statement about a compound is incorrect?
A. Its molecule contains atoms of different elements
B. Ratio of atoms is fixed
C. Compound retains physical properties of constituent elements
D. Cannot be separated by physical methods
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If the density of O2(g) at NTP is 1.429 g/L, what is its standard molar volume?
A. 22.39 L
B. 25 L
C. 21.2 L
D. None of these
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50 g of CaCO3 contains how many oxygen atoms?
A. 6.033 × 1023
B. 9.033 × 1023
C. 8.033 × 1023
D. 3.033 × 1023
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The mass of 2.044 × 1023 carbon atoms is:
A. 15 g
B. 38 g
C. 24 g
D. 48 g
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How many grams of CaCl2·6H2O are required to prepare 1 L of 1 M solution?
A. 200 g
B. 216 g
C. 219 g
D. None of these
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Which equation does not follow the law of conservation of mass?
A. 2Mg(s) + O2(g) → 2MgO(s)
B. C3H8(g) + O2(g) → CO2(g) + H2O(g)
C. CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)
D. P4(s) + 5O2(g) → P4O10(s)
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How many mL of water should be added to 200 mL of 0.65 M HCl to obtain 0.20 M?
A. 450 mL
B. 750 mL
C. 550 mL
D. 500 mL
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Number of gram molecules of oxygen in 6.02 × 1024 CO molecules is:
A. 10
B. 5
C. 0.1
D. 0.5
-
Which sample has maximum atoms?
A. 0.5 g-atoms Cu
B. 0.635 g Cu
C. 0.25 moles Cu atoms
D. 1 g Cu
-
If the temperature is 200°F, what is it on Celsius scale?
A. 45°C
B. 93°C
C. 93.3°C
D. 35°C
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X and Y form two compounds, XY and X2Y. 0.1 moles XY weighs 10 g and 0.05 moles X2Y weighs 9 g. Atomic weights?
A. 60, 40
B. 80, 20
C. 30, 20
D. 20, 30
-
Which contains the maximum number of water molecules?
A. 18 molecules
B. 18 grams
C. 1.8 grams
D. 18 moles
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No. of atoms in 0.1 mole of a triatomic gas is:
A. 1.806 × 1023
B. 3.60 × 1023
C. 1.806 × 1022
D. 6.026 ×1022
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A gas X has Cp/Cv = 1.4. At NTP, 11.2 L of X contains how many atoms?
A. 3.01 × 1023
B. 1.2 × 1023
C. 2.01 × 1023
D. 6.02 × 1023
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Boron exists as 10B (19%) and 11B (81%). What is the average atomic weight of boron?
A. 10.0
B. 10.5
C. 11.4
D. 10.8
MCQ Answer Key
| Q.No. | Answer | Explanation |
|---|---|---|
| 1 | A | CO and N2 have the same molar mass, hence same molecules per volume. |
| 2 | D | 1 gram molecule of benzene equals its molar mass, 78 g. |
| 3 | A | Mass ratio 14:16, thus volume ratio 7:8 for N2:O2. |
| 4 | A | Unified mass symbol “u” replaces amu as per IUPAC conventions. |
| 5 | B | Avogadro’s law: V ∝ n (number of moles). |
| 6 | C | Compounds do NOT retain constituent elements’ physical properties. |
| 7 | A | Standard molar volume is mass/density = 32g/1.429gL ≈ 22.39 L. |
| 8 | B | 50g CaCO3 contains 9.033 × 1023 oxygen atoms after calculation. |
| 9 | C | (2.044 × 1023 atoms / 6.022 × 1023) × 12 g/mol = 24 g. |
| 10 | C | Molar mass of CaCl2·6H2O = 219 g/mol; 1M in 1L = 219 g. |
| 11 | B | Equation (B) is unbalanced; doesn’t conserve mass. |
| 12 | A | Using M1V1 = M2V2, get 650 × 200 = 0.2 × V; V=650 mL; water to add = 650-200=450 mL. |
| 13 | B | 6.02 × 1024 / 6.022 × 1023 = 10 mol CO, so 5 mol O. |
| 14 | A | 0.5 g-atoms Cu has the highest particle count. |
| 15 | C | 200°F = (200-32)×5/9 = 93.3°C. |
| 16 | B | Using the given moles and masses, solve simultaneous equations for atomic weights. |
| 17 | D | 18 moles have highest number: 18 × Avogadro's number of molecules. |
| 18 | A | 0.1 × Avogadro × 3 = 1.806 × 1023 atoms in 0.1 mol triatomic gas. |
| 19 | D | For diatomic, 11.2 L at NTP = 0.5 mol; Avogadro's number atoms. |
| 20 | D | Weighted average = (10×0.19)+(11×0.81) = 10.81 or 10.8. |
Explanations clarify reasoning behind each answer and help students understand important NEET concepts.
How These MCQs Help in NEET
Practicing Some Basic Concepts in MCQ strengthens foundational chemistry needed for NEET. These MCQs sharpen calculation skills and deepen concept clarity. Analyzing answer keys helps spot errors. For more practice, take the Vedantu NEET Chemistry MCQ Practice or the chapterwise Chemistry NEET test to boost exam performance.
Next Steps & Practice Tips
- Review explanations for wrong answers and attempt similar questions again.
- Time yourself to build real NEET test stamina and speed.
- Use the NEET Chemistry Important Questions for focused revision.
- Track your progress using Vedantu’s mock test analytics.
- For NEET 2025, follow the complete updated Chemistry syllabus regularly.
To succeed in NEET Chemistry, regular practice with Some Basic Concepts in MCQ is essential. These MCQs reinforce core knowledge, boost problem-solving speed, and help identify key exam trends. Use Vedantu’s resources for continued self-assessment, improvement, and higher NEET Chemistry scores.
FAQs on Some Basic Concepts In MCQ for NEET Preparation
1. What is included in the NEET Chemistry Mock Test: Some Basic Concepts in MCQ?
The NEET Chemistry Mock Test: Some Basic Concepts in MCQ includes chapterwise MCQs covering fundamental topics, instant answer keys, detailed solutions, and result analytics to help you assess your preparation. Key features:
- 20+ high-quality MCQs based on NEET syllabus
- Answer key and explanations for all questions
- Score analytics and exam-aligned marking scheme
- Practice tailored to "Some Basic Concepts of Chemistry"
2. Are answer keys and solutions provided for all questions?
Yes, answer keys and detailed solutions are instantly provided for every question in the NEET Chemistry Mock Test. After submitting the test, you receive:
- Question-by-question answer key
- Stepwise expert solutions
- Concept explanations to clear doubts
3. How can I download the Some Basic Concepts in MCQ PDF?
To download the Some Basic Concepts in MCQ PDF, simply look for the download option after taking the test or visit NEET Chemistry resources provided on trusted educational platforms. Steps include:
- Complete the online test or access the PDF section
- Click on the “MCQ PDF Download” link for instant access
- Save the file for offline revision
4. Is this mock test suitable for Class 11 Chemistry preparation?
Yes, this mock test on Some Basic Concepts is perfectly aligned for Class 11 Chemistry students and NEET aspirants seeking foundational practice. It covers:
- Important Class 11 chapter concepts
- Exam-style MCQs with expert solutions
- Pattern matching actual NEET and school exams
5. Can I take this Some Basic Concepts MCQ test online for free?
Yes, the Some Basic Concepts in MCQ test is available online for free. You simply need to:
- Access the test page on a reputable NEET preparation website
- Click the “Start Test Now” button
- Attempt all questions without any subscription fees
6. What is the exam pattern and marking scheme for the NEET Chemistry Mock Test: Some Basic Concepts in MCQ?
The NEET Chemistry Mock Test follows the current NEET exam pattern. Key points:
- Total questions: 35 MCQs
- Marking: +4 for correct, -1 for wrong answers
- Duration: 60 minutes, timed with no pausing allowed
- All questions are single-answer, objective-type
7. How do I interpret my NEET Chemistry Mock Test results and analytics?
Your NEET Chemistry Mock Test results display:
- Total marks obtained
- Number of correct and incorrect responses
- Percentile or rank (if sufficient users attempt the test)
8. What are the best strategies to prepare for Some Basic Concepts MCQ in NEET Chemistry?
Effective strategies for Some Basic Concepts MCQ preparation include:
- Revise mole concept, Avogadro’s number, and chemical laws
- Attempt timed MCQs regularly to improve speed
- Analyze detailed solutions to fix conceptual gaps
- Re-attempt incorrect questions and retake tests
- Refer to Class 11 Chemistry books for clarification
9. Does practicing Some Basic Concepts in MCQ online help with NEET time management?
Yes, online practice of Some Basic Concepts in MCQ is highly effective for NEET time management. Benefits include:
- Simulates exam timing and pressure
- Improves pace and accuracy
- Lets you practice making quick, accurate choices
10. What should I do if I consistently score low on “Some Basic Concepts” MCQs?
If you score low on Some Basic Concepts MCQs in NEET Chemistry:
- Review all explanations for your mistakes
- Focus on core concepts and revise formulas
- Retake chapterwise tests to reinforce learning
- Join doubt sessions or seek expert clarification
11. Does Vedantu provide analytics to track my chapterwise score progress over time?
Yes, after each Vedantu NEET Chemistry Mock Test, you receive analytics that show:
- Chapterwise scores
- Improvement trends
- Areas that need revision
12. Are time management tips included for NEET Chemistry Some Basic Concepts MCQ?
Yes, time management strategies are part of effective MCQ practice on Some Basic Concepts, ensuring you:
- Use a timer for each test
- Avoid getting stuck on any single question
- Mark for review and return later, if unsure
- Practice more mocks to get comfortable with pace
