Unit 16 • Class 10Science & Technology (Sci.101)
Gases
ग्यासहरू
Laboratory preparation, properties, and chemical tests of Carbon Dioxide (CO2) and Ammonia (NH3) gases, greenhouse effect, and acid rain.
Lesson Summary & Key Concepts
Laboratory preparation apparatus, chemical reactions, drying agents, collection methods, and chemical confirmatory tests for Carbon Dioxide (CO2) and Ammonia (NH3) gases, plus greenhouse effect and acid rain.
Textbook Exercises & Solutions
Showing 1 of 1 Solved QuestionsQuestion 1• 4 Marks
Quick Revision Takeaways
Common Exam Pitfalls to Avoid
⚠️ Common Error: Using dilute H2SO4 instead of dilute HCl with marble chips.
✓ Correct Approach: Always use dilute HCl. Dilute H2SO4 forms insoluble CaSO4 coating that terminates the reaction prematurely.
Why: Insoluble CaSO4 coats marble chips and prevents further acid penetration.
Content Provenance & Verification
Editorial Verified & Published
Original Author / ContributorNEB Notes Nepal Academic Panel
Verified ByDr. R. P. Bhattarai (Senior Physics Faculty)
Curriculum Versionv1.0 (CDC 2078/2080 Grid)
Last Verified Date2026-10-23
Legitimate Official Curriculum References
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