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प्रश्न
Respiration is a ______ change.
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उत्तर
Respiration is a exothermic chemical change.
APPEARS IN
संबंधित प्रश्न
What do you observe when Ammonia is brought in contact of hydrogen chloride.gas.
Define endothermic reactions. Give two examples of each.
What do you observe when ammonium chloride is dissolved in water.
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Heat energy is evolved in these reactions
- Thermal decomposition reactions
- Exothermic reactions
- Endothermic reactions
- None of these
Identify the endothermic and exothermic reaction.
HCl + NaOH → NaCl + H2O + heat
Give scientific reasons.
While preparing dil. Sulphuric acid from concentrated conc. sulphuric acid in the laboratory the concentrated sulphuric acid is, add slowly to water with constant stirring.
Give an example of the following chemical changes.
A reaction involving blue solution.
State which type of chemical reaction proceeds with evolution of heat energy.
Give an example with a balanced equation, of the following reaction:
photochemical reaction
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.
