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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.
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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
Explain the term with examples.
Endothermic reaction
Name a carbonate which do not decompose on heating.
Name a nitrate which produces oxygen as the only gas.
What do you observe? When
Lead nitrate is heated.
State which type of chemical reaction proceeds with evolution of heat energy.
Complete the statement by filling in the blank with the correct word:
The reaction of coke with steam to give water gas is an example of an __________ reaction.
Chemical reactions may proceed with evolution of heat. Give an example.
Chemical reactions may proceed with absorption of heat. Give an example.
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.
