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प्रश्न
State the following reaction whether heat is evolved or absorbed –
water is added to quicklime
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उत्तर
When water is added to quicklime heat is evolved.
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संबंधित प्रश्न
State the effect of an endothermic reaction.
FILL IN THE BLANK
In a................ reaction heat energy is absorbed.
Identify the endothermic and exothermic reaction.
HCl + NaOH → NaCl + H2O + heat
Define exothermic and endothermic changes. Give two example in each case.
Complete the statement by filling in the blank with the correct word:
The element molybdenum used in the reaction of nitrogen with hydrogen at elevated temperatures is an example of a ________.
Chemical reactions may proceed with absorption of heat. Give an example.
Give an example with a balanced equation, of the following reaction:
endothermic reaction
Mention any two exothermic reactions.
The Dissolution of glucose in water is also an ______ change.
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.
