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Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 8
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Syllabus

Balance the following chemical equation. Na + O2 → Na2O3 Ca + N2 → Ca3N2 N2 + H2 →NH3 CaCO3 +HCl → CaCl2 + CO2 +H2O Pb(NO3)2 → PbO + NO2 + O2

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Question

Balance the following chemical equation.

  1. Na + O2 → Na2O3
  2. Ca + N2 → Ca3N2
  3. N2 + H2 →NH3
  4. CaCO3 +HCl → CaCl2 + CO2 +H2O
  5. Pb(NO3)2 → PbO + NO2 + O2
Short/Brief Note
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Solution

  1. 4Na + O2 → 2Na2O
  2. 3Ca + N2 → Ca3N2
  3. N2 + 3H2 → 2NH3
  4. CaCO2 + 2HCl → CaCl2 + H2O + CO2
  5. 2Pb (NO3)2 → 2PbO + 4NO2 + O2
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Q V. 4.
Chapter 12: Atomic Structure - Exercises [Page 137]

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Samacheer Kalvi Science [English] Class 8 TN Board
Chapter 12 Atomic Structure
Exercises | Q V. 4. | Page 137
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