Question

Define with examples
1. Double displacement reaction
2. Single displacement reaction
3. Redox reaction
4. Decomposition reactions
5. Combination reaction

Answer 1

Explanation:

1. A double displacement reaction, also known as a double replacement reaction or metathesis reaction, is a type of reaction that occurs when the cations and anions switch between two reactants to form new products. ... After that, we switch the ions of the two reactants and write down the products.
2. A single-displacement reaction occurs when an element replaces another element in a compound. A metal only replaces a metal, and a nonmetal only replaces a nonmetal. Only a more reactive element can replace the other element in the compound with which it reacts
3. An oxidation-reduction (redox) reaction is a type of chemical reaction that involves a transfer of electrons between two species. ... The formation of hydrogen fluoride is an example of a redox reaction. We can break the reaction down to analyze the oxidation and reduction of reactants.
4. A decomposition reaction occurs when one reactant breaks down into two or more products. This can be represented by the general equation: AB → A + B. Examples of decomposition reactions include the breakdown of hydrogen peroxide to water and oxygen, and the breakdown of water to hydrogen and oxygen.
5. Na2 + H2O `->` 2NaOH. Here sodium oxide is combined with water gives sodium hydroxide.4Li + O2 `->` 2Li2O. Here lithium is combined with oxygen to form lithium oxide.2Mg + O2 `->` 2 MgO. ...H2 + Cl2 `->` 2 HCL. ...

• NH3 + HCl `->` NH4Cl. ...

Answer 2

1. Double displacement reaction

Double displacement reactions generally take place in aqueous solutions in which the ions precipitate and there is an exchange of ions. For example, on mixing a solution of barium chloride with sodium sulphate, a white precipitate of barium sulphate is immediately formed. These reactions are ionic in nature.

2. Single displacement reaction

A chemical reaction in which - an element or radical - has replaced another element in a compound.

Example - A + BC - - > AC + B

3. REDOX REACTION

A Chemical reaction involving - oxidation of one substance and reduction of the other is called a redox reaction. All chemical reactions involving loss or gain of electrons are considered as redox reaction. Where oxidation and reduction occurs simultaneously.

Example : Cl2 + H2S - - - > 2HCl + S