Advertisements
Advertisements
Question
What do you understand by exothermic reactions?
Advertisements
Solution
Exothermic reaction is the chemical reaction that produces heat along with products.
Example: CaO + H2O → Ca(OH)2 + Heat
APPEARS IN
RELATED QUESTIONS
Write the balanced chemical equation for the following reaction.
\[\ce{Barium chloride + Potassium sulphate → Barium sulphate + Potassium chloride}\]
Correct and balance the following equation:
N + H 
NH3
Write complete balanced equation for the following reaction:
Calcium (solid) + water (liquid) 
Calcium Hydroxide (solution) + Hydrogen (gas)
Fill in the following blank with suitable word:
A solution made in water is known as an ........... solution and indicated by the symbol ...........
Balance the following chemical equation:
MnO2 + HCI → MnCI2 + CI2 + H2O
Potassium chlorate (KClO3) on heating forms potassium chloride and oxygen. Write a balanced equation for this reaction and indicate the evolution of gas.
When potassium nitrate is heated, it decomposes into potassium nitrite and oxygen. Write a balanced equation for this reaction and add the state symbols of the reactants and products.
What is meant by chemical reaction? Explain with the help of an example.
Give one example of a chemical reaction characterised by change in state.
Is Photosynthesis an endothermic reaction or an exothermic reaction?
Balance the following equation. Also name the product formed.
` "H"_2"O"_2 → "H" _2 "O" + "O"_2`
Write your observation and name the product when zinc reacts with dilute hydrochloric acid.
To determine the percentage of water absorbed by raisins, raisins are soaked in water for:
Sodium chloride reacts with silver nitrate to produce silver chloride and sodium nitrate
Write the equation.
Check whether it is balanced, if not balance it.
Find the weights of reactants and products.
State the law which this equation satisfies.
In certain reaction a change of state is observed i.e. solid to liquid, liquid to gas etc. – State the change of state of the products – to give the respective reactant.
\[\ce{C +2S -> CS2}\]
In certain reaction a change of state is observed i.e. solid to liquid, liquid to gas etc. – State the change of state of the products – to give the respective reactant.
\[\ce{2H2O ->[electric][current] 2H2 + O2}\]
Write a balanced equation for the following word equation:
Calcium hydroxide + Ammonium chloride → Calcium chloride + Water + Ammonia
What is a product in a chemical equation?
A student took a small amount of copper oxide in a conical flask and added dilute hydrochloric acid to it with constant stirring. He observed a change in colour of the solution.
- Write the name of the compound formed and its colour.
- Write a balanced chemical equation for the reaction involved.
Dil. HCl is added to Zn granules. How will you prove that chemical change has taken place here? Support your response with two arguments.
