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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.
विकल्प
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.
उत्तर
Both A and R are true and R is the correct explanation of A
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संबंधित प्रश्न
What do you observe when Ammonia is brought in contact of hydrogen chloride.gas.
What do you observe when ammonium chloride is dissolved in water.
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State the following reaction whether heat is evolved or absorbed –
water is added to quicklime
Chemical reactions may proceed with evolution of heat. Give an example.
Give an example with a balanced equation, of the following reaction:
endothermic reaction
Mention any two exothermic reactions.
Give examples for the exothermic process.
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.
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.
