Question

.a) What is decomposition reaction? Explain with an example.
[2]
Explain displacement reaction and double displacement reaction with example.[​

Answer 1

Answer:

1.A decomposition reaction is a type of chemical reaction in which a single compound breaks down into two or more elements or new compounds. ... Examples of decomposition reactions include the breakdown of hydrogen peroxide to water and oxygen, and the breakdown of water to hydrogen and oxygen.

2.A displacement reaction is the one where in the atom or a set of atoms is displaced by another atom in a molecule. For example, when Iron is added to a copper sulphate solution, it displaces the copper metal. A + B-C → A-C + B.

A double displacement reaction is a type of chemical reaction where two compounds react, and positive ions (cation) and the negative ions (anion) of the two reactants switch places, forming two new compounds or products. For example, Na2S+2HCl→2NaCl+H2S.

Answer 2

Answer:

a) Decomposition reaction occurs when one reactant breaks down into two or more products...EX-the breakdown of hydrogen peroxide to water and oxygen.and the breakdown of water to hydrogen and oxygen.

b)A single displacement reaction is a chemical reaction in which one element replaces an/other element in a compound.EX-hcl,mg..

A double displacement reation occurs when parts of two ionic compounds are exchanged,making to new compounds.EX-CuCl.....