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प्रश्न
Chemical reactions may proceed with absorption of heat. Give an example.
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उत्तर
Chemical reaction is characterised by absorption of heat:
\[\ce{\underset{\text{nitrogen}}{N2} + \underset{\text{oxygen}}{O2} + ->[3000°C]\underset{\text{nitrogen monoxide}}{2NO (g)}}\]
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संबंधित प्रश्न
Explain the term with examples.
Endothermic reaction
Identify the endothermic and exothermic reaction.
HCl + NaOH → NaCl + H2O + heat
Explain the term energy changes in a chemical change or 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.
Select the correct answer from the options given below:
State the gaseous product formed, when
An exothermic reaction takes place between ammonia and neutral gas.
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 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 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 added slowly to water with constant stirring.
