Some Basic Concepts of Chemistry · Class 11 Chemistry · Chapter 1
🧪 Some Basic Concepts of Chemistry
CBSE Class 11 Science · Chemistry · Chapter 1
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Six free PDFs + an editable PPTX cover every angle of this chapter — read the deck, drill the MCQs, sit the full paper, then check against the marking scheme.
📖Notes Deck
Full lecture deck with teaching paragraphs, misconception red-boxes, and glossary. Read this first.
Download PDF →📝Quick Drill
15 pattern-tagged MCQs with per-Q time budget. Drill under a 20-min timer.
Download PDF →📄Exam Paper
Full exam-pattern paper with sections. Sit it closed-book before checking the marking scheme.
Download PDF →✅Marking Scheme + Topper Templates
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Download PDF →⚡Cheat Sheet
1-page exam-day card: key points, top question patterns, 90-minute revision flow.
Download PDF →👨👩👧For Parents
1-page plain-language parent guide: what's being learned + questions to ask your child.
Download PDF →Top question patterns · CBSE annual / SQP aggregate
| 90% | Moles / molecules / atoms from a given mass — n = mass/M; multiply by 6.022 x 10^23 for molecules; multiply again by atoms-per-molecule for atoms. | 3 MARKS |
| 75% | Molarity or molality of a solution — Molarity uses litres of solution; molality uses kg of solvent. Watch g->kg and mL->L conversions. | 3 MARKS |
| 60% | Limiting reagent + mass of product — Compare coefficient-scaled moles, NOT grams. Compute product from the limiting reagent only. | 5 MARKS |
| 55% | Empirical / molecular formula from % composition — % -> moles (/atomic mass) -> divide by smallest -> whole-number ratio; n = M / empirical mass. | 3 MARKS |
| 50% | State and verify a law of chemical combination — Name the law, state it precisely, then show the given data obeys the constant/whole-number ratio. | 3 MARKS |
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