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प्रश्न
Chemical reactions may proceed with evolution of heat. Give an example.
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उत्तर
Chemical reaction is characterised by evolution of heat:
\[\ce{\underset{\text{carbon}}{C} +\underset{\text{oxygen}}{O2}->\underset{\text{carbon dioxide}}{CO2} + Heat}\]
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संबंधित प्रश्न
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
Identify the endothermic and exothermic reaction.
\[\ce{2KClO_{3(s)}->[\Delta] 2KCl_{(s)} + 3O2}\]
Name a nitrate which produces oxygen as the only gas.
State which type of chemical reaction proceeds with evolution of heat energy.
State the following reaction whether heat is evolved or absorbed –
Two neutral gases combine to give a basic gas.
Give an example with a balanced equation, of the following reaction:
exothermic reaction
Give an example with a balanced equation, of the following reaction:
endothermic reaction
Give an example with a balanced equation, of the following reaction:
electrochemical 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 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.
