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प्रश्न
Classify the following reaction into Exothermic and Endothermic reactions.
Magnesium ribbon when burned in air, it forms magnesium oxide.
विकल्प
Exothermic reaction
Endothermic reaction
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उत्तर
Magnesium ribbon when burned in air, it forms magnesium oxide- Exothermic reaction
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संबंधित प्रश्न
What do you observe when Ammonia is brought in contact of hydrogen chloride.gas.
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Heat energy is evolved in these reactions
- Thermal decomposition reactions
- Exothermic reactions
- Endothermic reactions
- None of these
Complete the following statement.
On heating, hydrated copper sulphate changes its colour from ________ to __________.
State the effects of endothermic and exothermic reactions on the surroundings.
Name a compound which produces carbon dioxide on heating.
What do you observe? When
Lead nitrate is heated.
Define exothermic and endothermic changes. Give two example in each case.
State which type of chemical reaction proceeds with the absorption of heat energy.
Differentiate between the following:
A catalyst and a promoter.
Chemical reactions may proceed with evolution of heat. Give an example.
Chemical reactions may proceed with absorption of heat. Give an example.
Give an example with a balanced equation, of the following reaction:
exothermic reaction
Select the correct answer from the options given below:
State the gaseous product formed, when
Two gases one of them neutral combines by absorption of light energy.
Write an Explanation.
Endothermic reaction
True or False. If false, give the correct answer.
Tarnishing of silver is an example of endothermic change.
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 a 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.
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.
