Advertisements
Advertisements
Question
Explain the following reaction with one suitable example of Decomposition reaction
Advertisements
Solution
Decomposition reaction : In this reaction a substance breaks up on heating to form two or more simpler substances, e.g. Electrolysis of water.
APPEARS IN
RELATED QUESTIONS
Give reason.
Acidic soil is treated with quick lime.
Fill in the blank.
Melting of ice is a _______ change.
Copper carbonate when heated, it turns :
State four conditions necessary for a chemical reaction to take place.
Explain the following reaction with one suitable example of Displacement reaction.
Give an example of a reaction where the following are involved:
Close contact
Give an example of the following chemical change.
Two solids combine to form a liquid
Give reason for the following:
Molybdenum is used in the manufacture of ammonia.
Give an example of the following chemical changes.
A reaction where colour change is noticed.
State the original colour of the following substance and colour of residue obtained after heating.
Copper carbonate
State the original colour of the following substance and colour of residue obtained after heating.
Lead nitrate
Give a chemical test to distinguish between the following gases.
SO2 and Cl2
What do you observe when dilute sulphuric acid is added to the following:
Sodium Sulphide
Give examples of exothermic reactions i.e. heat evolved in each of the following:
(a) reaction between a solid and a liquid
(b) reaction between two gases
Give two examples of exothermic reactions seen in everyday life.
Explain the following statement: Digestion is a chemical change.
Burning of paper is a ______ change.
Photosynthesis is a chemical reaction that takes place in the presence of ______.
On heating calcium carbonate gets converted into calcium oxide and carbon dioxide.
(a) Is this a physical or a chemical change?
(b) Can you prepare one acidic and one basic solution by using the products formed in the above process? If so, write the chemical equation involved.
______ occurs in the absence of air and in the presence of micro-organisms such as yeast.
What is the difference between reactants and products?
