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

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$<font color= " red">$Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.$<marquee>♥mark as brainliest..✌♥</marquee>$

Answer 2

Answer:

1 Chemical reactions- The transformation of chemical substance into a new chemical substance by making and breaking of bonds between different atoms is known as Chemical Reaction.

2A chemical equation needs to be balanced because a chemical reaction is just a rearrangement of atoms. Atoms themselves are neither created nor destroyed during the course of a chemical reaction. The chemical equation needs to be balanced to follow the law of conservation of mass.

3 In simple terms, the endothermic reactions absorb energy from the surrounding that is in the form of heat. ... On the other hand, an exothermic reaction releases energy into the surrounding of the system.

4 A combination reaction is a reaction where two or more elements or compounds (reactants) combine to form a single compound (product). Ba+F2⟶BaF2. A decomposition reaction is a type of chemical reaction in which a single compound breaks down into two or more elements or new compounds.

5In a double displacement reaction, two atoms or a group of atoms switch places to form new compounds. In a displacement reaction, one displacement takes place. ... Salt solutions of two different metals react with each other. Examples: 2KI + Cl2 → 2KCl + I2 is a displacement reaction.

Hope this helps you☺