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प्रश्न
Give an example with a balanced equation, of the following reaction:
photochemical reaction
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उत्तर
Example of photochemical reaction:
(i) \[\ce{H2 + Cl2->[sun light]2HCl}\]
Slow reaction in diffused sun light
Explosive reaction in direct sun light
(ii) \[\ce{6CO2 + 12H2O->[chlorophyll][sun light]C6H12O6 + 6H2O + 6H2}\]
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संबंधित प्रश्न
Give scientific reason.
While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is added slowly to water with constant stirring.
Name a carbonate which do not decompose on heating.
State which type of chemical reaction proceeds with evolution of heat energy.
Chemical reactions may proceed with evolution of heat. Give an example.
Chemical reactions may proceed with absorption of heat. Give an example.
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.
Mention any two exothermic reactions.
Give examples of the endothermic process.
Complete the following table:
| Chemical Reactions | Name reaction type |
| \[\ce{C(s) + O2(g) -> CO2(g)}\] | (a) ________ |
| \[\ce{Zn(s) + CuSO4(aq) ->}\] (b) _________ | Displacement reaction |
| \[\ce{2Cu(s) + O2(g) ->[heat] 2CuO(s)}\] | (c) _________ |
| \[\ce{C(s) + 2H2(g) -> CH4(g)}\] | (d) _________ |
| \[\ce{CaO(s) + H2O(l) -> Ca(OH)2(aq) + heat}\] | (e) _________ |
| \[\ce{CaCO3(s) + Heat ->}\] (f) _________ | Endothermic Reaction |
Give scientific reasons.
While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is added slowly to water with constant stirring.
