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प्रश्न
Assertion: A drop of petrol when touched with finger gives a chill feeling.
Reason: The above phenomenon is an endothermic one.
पर्याय
Both A and R are true and R is the correct explanation of A
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false but R is true.
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उत्तर
Both A and R are true and R is the correct explanation of A
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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.
\[\ce{CaCO_{3(s)}->[\Delta] CaO_{(s)} + CO2}\]
Give an example of the following chemical changes.
A photochemical reaction involving silver salt.
Name a nitrate which produces oxygen as the only gas.
Give an example of an endothermic reaction.
Chemical reactions may proceed with absorption of heat. Give an example.
Give an example with a balanced equation, of the following reaction:
endothermic reaction
Give an example with a balanced equation, of the following reaction:
photochemical reaction
Mention any two exothermic reactions.
Give scientific reason.
While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is slowly added to water with constant stirring.
