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प्रश्न
Supply of energy may be required to initiate a reaction. State the different forms with a suitable example of reactions initiated by the supply of energy.
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उत्तर
Different forms of energy:
(i) Heat energy: \[\ce{N2 + O2 ->[3000^{°}C] 2NO}\]
(ii) Light energy: \[\ce{H2 + Cl2 ->[Sunlight] 2HCl}\]
(iii) Electricity: \[\ce{\underset{[acidified]}{2H2O}->[Electric][Current] \underset{[cathode]}{2H2} + \underset{[anode]}{O2}}\]
(iv) Pressure: \[\ce{N2 + 3H2 <=>[Fe/450-500°C][200 atmos.pressure] 2NH3}\
(v) Catalyst: \[\ce{4HN3 + 5O2 -> [Pt./800°C] 4NO + 6H2O}\]
(vi) Sound Energy: \[\ce{\underset{[acetylene]}{C2H2}->[Sound][Energy] 2C + H2}\]
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संबंधित प्रश्न
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| Colum I | Column II | ||
| 1. | Alloying | a. | Exothermic change |
| 2. | Crystallization | b. | Periodic change |
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| 4. | Seasonal changes | d. | Pure solid |
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| Chemical Reactions | Name reaction type |
| \[\ce{C(s) + O2(g) -> CO2(g)}\] | (a) ________ |
| \[\ce{Zn(s) + CuSO4(aq) ->}\] (b) _________ | Displacement reaction |
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| \[\ce{C(s) + 2H2(g) -> CH4(g)}\] | (d) _________ |
| \[\ce{CaO(s) + H2O(l) -> Ca(OH)2(aq) + heat}\] | (e) _________ |
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