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Question
Give an example of the following chemical changes.
An exothermic and an endothermic reaction involving carbon as one of the reactants.
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Solution
Exothermic reaction:
When carbon burns in oxygen to form carbon dioxide, a lot of heat is produced.
C + O2 → CO2 + Heat
Endothermic reaction:
When carbon is heated with sulphur at high temperature, liquid carbon disulphide is formed.
\[\ce{C + 2S ->[\Delta] CS2}\]
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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
Explain the term with examples.
Endothermic reaction
Name a compound which produces carbon dioxide on heating.
State which type of chemical reaction proceeds with the absorption of heat energy.
Select the correct answer from the options given below:
State the gaseous product formed, when
An exothermic reaction takes place between ammonia and neutral gas.
Mention any two exothermic reactions.
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.
