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Revision Notes
Some Basic Concepts of Chemistry — Revision Notes
Maharashtra Board · Class 11 · Chemistry
Some Basic Concepts of Chemistry revision notes for Maharashtra Board Class 11 Chemistry: 4 topics in quick points.
45 questions25 flashcards4 formulas & key relations5 concepts
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Key Topics to Revise
1
Nature and Classification of Matter
- Matter occupies space and has mass - can be classified into pure substances and mixtures
- Pure substances have definite composition and properties (elements and compounds)
- Elements cannot be broken down by chemical means (metals, non-metals, metalloids)
2
Laws of Chemical Combination
- Law of Conservation of Mass: Total mass of reactants = Total mass of products
- Law of Definite Proportions: A compound always contains same elements in same proportion by mass
- Law of Multiple Proportions: When two elements form multiple compounds, masses of one element combining with fixed mass of another are in simple whole number ratios
3
Atomic Theory and Atomic Mass
- Dalton's Atomic Theory: Matter consists of indivisible atoms, atoms of same element are identical, compounds form by combining atoms in fixed ratios
- Atomic mass is measured relative to C-12 isotope (assigned exactly 12 u)
- 1 atomic mass unit (u) = 1.66056 × 10⁻²⁴ g
4
Mole Concept and Molar Mass
- 1 mole = 6.022 × 10²³ particles (Avogadro's number)
- Mole is SI base unit for amount of substance
- Molar mass = mass of 1 mole of substance in grams
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Full NotesKey Concepts
Matter is anything that occupies spacePhysical properties (colorSeven fundamental SI unitsFive fundamental lawsAtomic mass is relative to C
Frequently Asked Questions
What are the important topics in Some Basic Concepts of Chemistry for Maharashtra Board Class 11 Chemistry?
Key topics in Some Basic Concepts of Chemistry include Nature and Classification of Matter, Laws of Chemical Combination, Atomic Theory and Atomic Mass, Mole Concept and Molar Mass. Study these first, then practise questions on each for Class 11 exams.
How should I revise Some Basic Concepts of Chemistry for Class 11 exams?
Learn the core ideas first, then work through the 45 practice questions on Some Basic Concepts of Chemistry. Revise definitions regularly and use flashcards for quick recall before the exam.
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Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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