Question

1. What is Reversible and Irreversible Reaction? Explain with the help of examples.

2. What is Substitution Reactions?Give some examples.

3. Explain Double displacement reactions and Neutralization reaction.Explain with the help of examples.




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Answer 1

1A)

A reversible reaction is a reaction in which the conversion of reactants to products and the conversion of products to reactants occur simultaneously.

Examples of reversible reactions

• Ammonium chloride is a white solid. It breaks down when heated, forming ammonia and hydrogen chloride. ...
• Ammonium chloride ⇌ ammonia + hydrogen chloride.
• The symbol ⇌ has two half arrowheads, one pointing in each direction. It is used in equations that model reversible reactions

A reversible reaction is a reaction in which the conversion of reactants to products and the conversion of products to reactants occur simultaneously.

Example:- Fuel + O2 → CO2 + H2O.

2A)

A substitution reaction (also known as single displacement reaction or single substitution reaction) is a chemical reaction during which one functional group in a chemical compound is replaced by another functional group. ... A good example of a substitution reaction is halogenation.

3A)

In a double displacement reaction, atoms from two different compounds switch places. The reactants are two compounds and the products are two different compounds. For example: Fe2O3 + 6HCl → 2FeCl3 + 3H2O. Double displacement reactions can be further classified as neutralization and precipitation reactions.

Answer 2

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Ans 1 :- Reversible reaction : A reaction which takes place in both forward and backward direction is called reversible reaction. Irreversible reaction: A reaction in which entire amount of reactant is changed into product and no reaction from product side occurs in called irreversible reaction.

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Ans 2 :- A substitution reaction is also called a single displacement reaction, single replacement reaction, or single substitution reaction. The reactions in which an atom or group of atoms in a molecule is replaced or substituted by different atoms or group of atoms are called substitution reaction. Halogenation reaction is a type of substitution reaction.

Example:-

The conversion of methane to Carbon tetrachloride is a substitution reaction as hydrogen atoms are replaced by chlorine atoms.

CH4 + Cl2 → CH3Cl + HCl

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Ans 3 :- Yes, neutralization and precipitation reaction is double displacement reactions. These two reactions are types of double displacement reaction.

❒ neutralization reaction is a double displacement reaction taking place between the acids and the bases. The reaction between vinegar and baking soda is an example of a neutralization reaction. This reaction is used in explaining how do volcanoes erupt.

❒ precipitation reaction is a double displacement reaction taking place between two aqueous ionic compounds which forms a new insoluble ionic compound. The reaction between lead(II) nitrate and potassium iodide is an example of a precipitation reaction.

Other types of displacement reactions are:

• Acid-carbonate reactions
• Alkylation
• Counter-ion exchange

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