Advertisements
Advertisements
प्रश्न
Explain the term with examples.
Endothermic reaction
Advertisements
उत्तर
Endothermic reaction:
An endothermic reaction is any chemical reaction that absorbs heat from its environment. The absorbed energy provides the activation energy for the reaction to occur. A hallmark of this type of reaction is that it feels cold.
A good example of an endothermic reaction involves dissolving a salt. The salt doesn't have to be table salt, and the solvent doesn't need to be water.
- The reaction of barium hydroxide octahydrate crystals with dry ammonium chloride
- Dissolving ammonium chloride in water
- The reaction of thionyl chloride (SOCl2) with cobalt(II) sulphate heptahydrate
- Mixing water and ammonium nitrate
- Mixing water with potassium chloride
- Reacting ethanoic acid with sodium carbonate
- Photosynthesis (chlorophyll is used to react carbon dioxide plus water plus energy to make glucose and oxygen)
APPEARS IN
संबंधित प्रश्न
How will you obtain Ammonia from nitrogen.
Also give balanced equations for the reactions
Define endothermic reactions. Give two examples of each.
State the effect of an exothermic reaction on the surroundings.
Give an example of the following chemical changes.
A photochemical reaction involving silver salt.
Give an example of the following chemical changes.
A reaction involving blue solution.
Complete the following statement.
On heating, hydrated copper sulphate changes its colour from ________ to __________.
Why energy is involved in a chemical change?
State the effects of endothermic and exothermic reactions on the surroundings.
State which type of chemical reaction proceeds with evolution of heat energy.
State which type of chemical reaction proceeds with the absorption of heat energy.
Differentiate between the following:
A catalyst and a promoter.
Explain the term energy changes in a chemical change or reaction.
Supply of energy may be required to initiate a reaction. State the different forms with a suitable example of reactions initiated by the supply of energy.
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.
Classify the following reaction into Exothermic and Endothermic reactions.
Magnesium ribbon when burned in air, it forms magnesium oxide.
Respiration is a ______ change.
Give examples for the exothermic process.
Identify the type of chemical reaction given below:
\[\ce{2KClO3 -> 2KCl + 3O2 ^}\]
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.
