Unit I – Some Basic Concepts of Chemistry Objective Questions (Q1–Q60)

Description

📘 Unit I – Some Basic Concepts of Chemistry

Chemistry Class 11 का पहला chapter “Some Basic Concepts of Chemistry” बहुत ही महत्वपूर्ण है। यह chapter आगे की पूरी chemistry को समझने की नींव रखता है। इसमें आप laws of chemical combination, Dalton’s atomic theory, atomic mass, molecular mass, mole concept, molar volume, Avogadro’s number, percentage composition जैसे topics पढ़ते हैं।

इसी chapter से board exams और competitive exams जैसे NEET, JEE, CUET, NDA, State Boards में काफी सवाल पूछे जाते हैं।

इसलिए हम आपके लिए लेकर आए हैं —
📝 60 Objective Questions (MCQs) with Answers (English + Hindi Bilingual Format)

📑 Features of this Material:

✔️ कुल 60 MCQs with answers
✔️ सभी प्रश्न English + Hindi (bilingual) में दिए गए हैं
✔️ NEET/JEE level और CBSE/State Board level दोनों को cover करते हैं
✔️ सभी महत्वपूर्ण laws और concepts पर आधारित questions
✔️ Short, precise और exam-oriented content

📚 What You’ll Learn in This Chapter (Topics Covered):

1. Laws of Chemical Combination – Law of conservation of mass, law of definite proportions, law of multiple proportions, Gay-Lussac’s law of gaseous volumes, Avogadro’s hypothesis

2. Dalton’s Atomic Theory – Main postulates and limitations

3. Atomic Mass and Molecular Mass – Definition, calculation, units

4. Mole Concept – Avogadro’s number, molar mass, relation between mass, moles and volume

5. Percentage Composition – Formula and numerical questions

6. Empirical and Molecular Formula – Derivations and examples

7. Stoichiometry and Chemical Equations – Balancing and quantitative calculations

8. Important Constants – Atomic mass unit, Avogadro’s number, molar volume at STP