Question

1) What is chemical reaction?
2) What is balanced chemical equation? Why should chemical equations be balanced?
3) What is the difference between exothermic and endothermic reaction? Explain with example.
4) What is combination and decomposition reaction? Explain with example.
5) What is displacement and double displacement reaction? Explain with example.
6) What is redox reaction? Give example and identify oxidised and rudeced substance in the reaction.
7) Write short note on :-
a) Corrosion
b) Rancidity
8) How can you prevent any substance from corrosion and rancidity write the

Answer 1

Answer:

1) chemical reaction is one type of reaction which change the condition of any metal or chemical....

(2) chemical reaction is balanced because chemical reaction's elements should have equal to product....

5) replacement reaction should have in four walls rounded pot..... example:-caco3=co2+caO