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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
Define endothermic reactions. Give two examples of each.
Define exothermic and endothermic changes. Give two example in each case.
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Give an example with a balanced equation, of the following reaction:
electrochemical reaction
True or False. If false, give the correct answer.
Tarnishing of silver is an example of endothermic change.
Assertion: A drop of petrol when touched with finger gives a chill feeling.
Reason: The above phenomenon is an endothermic one.
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.
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.
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.
