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On heating copper powder in air, the sur...

On heating copper powder in air, the surface of copper powder becomes coated with black CuO. How can this black be converted into brown copper? Write chemical equation for the reaction that occurs during the colour change.

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MODERN PUBLICATION-CHEMICAL REACTIONS AND EQUATIONS-EXERCISE
  1. On heating copper powder in air, the surface of copper powder becomes ...

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  2. Translate the following statements into chemical equation and balance ...

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  3. Translate the following statements into chemical equation and balance ...

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  4. Translate the following statements into chemical equation and balance ...

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  5. Translate the following statements into chemical equation and balance ...

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  6. Give the values of x and y by balancing. x KNO3 rarr y KNO2+ O2

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  7. Give the values of x and y by balancing. x HCL +O3 rarr y H2O +2Cl2

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  8. Balance the following chemical equation: KClO3 rarr KCl+O2

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  9. Balance the following equations: Al+H2SO4 rarr Al2(SO4)3+H2

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  10. Balance the following chemical equation: H2+N2 rarr NH3

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  11. Balance the following equations: C6H6+O2 rarr CO2+ H2O

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  12. Balance the following equations: Fe2O3+C rarr Fe+CO

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  13. Balance the following chemical equation: NaOH+H2SO4rarrNa2SO4+H2O

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  14. Balance the following equation : CH4(g) +O2(g) rarr CO2 (g)+H2O(l)

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  15. Balance the following equation : Ba(OH)2+ HBr (aq) rarr BaBr2 (aq) +...

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  16. Balance the following equation : Al(s) +HCl(aq) rarr AlCl2(aq)+H2(g)

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  17. Balance the following equation : KCN (aq) +H2SO4(aq) rarr K2SO4(aq)+...

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  18. Which of the following are balanced equations: 2H2+O2 rarr H2O

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  19. Balance the following equations: C6H6+O2 rarr CO2+ H2O

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  20. Balance the following equations: C6H6+O2 rarr CO2+ H2O

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  21. Which of the following equations are balanced? 2HgO gives 2Hg + Oxyg...

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