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Aahaana
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Asked: 2020-10-18T08:58:49+00:00 In:

Write one equation each for decomposition reactions where energy is supplied in the form of heat, light or electricity.

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NCERT Solution for Class 10 Science Chapter 1
Chemical Reactions and Equations
Exercises Questions
Page No-16
Questions No-12

cbseclass10ncertscience
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    1. Decompositive reaction in presence of Heat:

      2Pb(NO3)2 (s)     — Heat →     2PbO (s)     +              4NO2(g)       +     O2(g)
      Lead Nitrate                         Leadoxide           Nitrogen dioxide         Oxygen
      Decompositive reaction in presence of Light:

      2AgCl                  – Light→     2Ag     +     Cl2 gas
      Silver Chloride (white)                         (grey)
      Decompositive reaction by the use of electricity:

      2H2O (l)    — Electricity→     2H2 (g)            +     O2 (g)

      water                                 hydrogen gas        oxygen gas

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