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प्रश्न
State which type of chemical reaction proceeds with evolution of heat energy.
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उत्तर
Exothermic reactions
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संबंधित प्रश्न
State the effect of an exothermic reaction on the surroundings.
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.
Identify the endothermic and exothermic reaction.
\[\ce{2KClO_{3(s)}->[\Delta] 2KCl_{(s)} + 3O2}\]
Complete the following statement.
On heating, hydrated copper sulphate changes its colour from ________ to __________.
State which type of chemical reaction proceeds with the absorption of heat energy.
Explain the term energy changes in a chemical change or reaction.
Give an example with a balanced equation, of the following reaction:
electrochemical reaction
Complete the statement by filling in the blank with the correct word:
The reaction of hydrogen burning in oxygen to give a neutral liquid is an example of ________ reaction.
Match the following:
| Colum I | Column II | ||
| 1. | Alloying | a. | Exothermic change |
| 2. | Crystallization | b. | Periodic change |
| 3. | Soap powder + water | c. | Mixing of molten solids |
| 4. | Seasonal changes | d. | Pure solid |
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.
