Question

What are the types of chemical reaction????????​

Answer 1

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Types of Chemical Rxn..?

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Combination reaction: Such a reaction in which a single product is formed from two or more reactants is known as a combination reaction.

CaO (s) + H2O (l) → Ca(OH)2 (aq)

Calcium oxide reacts vigorously with water to produce slaked lime (calcium hydroxide) releasing a large amount of heat.

A solution of slaked lime produced by the reaction is used for white washing walls. Calcium hydroxide reacts slowly with the carbon dioxide in air to form a thin layer of calcium carbonate on the walls. Calcium carbonate is formed after two to three days of white washing and gives a shiny finish to the walls. It is interesting to note that the chemical formula for marble is also CaCO3.

Ca(OH)2 (aq) + CO2 (g) → CaCO3 (s) + H2O (l)

(slaked lime) → (calcium carbonate)

Burning of coal: C (s) + O2 (g) → CO2 (aq)

Formation of water: H2 (g) + O2 (g) → H2O (aq)

Burning of natural gas (Methane): CH4 (g) + O2 (g) → CO2 (g) + H2O (l)

→ Exothermic reaction: An exothermic process releases heat, and causes the temperature of the immediate surroundings to rise The rice, potatoes and bread we eat contain carbohydrates. These carbohydrates are broken down to form glucose. This glucose combines with oxygen in the cells of our body and provides energy. The special name of this reaction is respiration is an exothermic reaction.

C6H12O6 (aq) + 6O2 (aq) → 6CO2 + 6H2O (l) + energy

(glucose)

→ Endothermic reaction: An endothermic process absorbs heat and cools the surroundings.

The decomposition of vegetable matter into compost is also an example of an endothermic reaction.

→ Decomposition reaction: When single reactant breaks down to give simpler products. This is a decomposition reaction.

White silver chloride turns grey in sunlight. This is due to the decomposition of silver chloride into silver and chlorine by light.

The above reactions are used in black and white photography.

→ Displacement reaction: Displacement reaction is a chemical reaction in which a more reactive element displaces a less reactive element from its compound. Both metals and non-metals take part in displacement reactions. Reaction of iron nails with copper sulphate solution.

Fe (s) + CuSO4 (aq) → FeSO4 (g) + Cu (s)

Pb (s) + CuCl2 (aq) → PbCl2 (aq) + Cu (s)

→ Double Displacement reaction: A double displacement reaction, also known as a double replacement reaction or metathesis, is a type of chemical reaction where two compounds react, and the positive ions (cation) and the negative ions (anion) of the two reactants switch places, forming two new compounds or products.

Na2(SO)4 (aq) + BaCl2 (aq) → BaSO4 (s) + NaCl (aq)

→ Redox reaction: An oxidation-reduction (Redox) reaction is a type of chemical reaction that involves a transfer of electrons between two species. An oxidation-reduction reaction is any chemical reaction in which the oxidation number of a molecule, atom, or ion changes by gaining or losing an electron.

Oxidation: This process involves gain of oxygen or loss of hydrogen.

Reduction: This process involves gain of hydrogen or loss of oxygen.

→ Oxidizing Agent: It is the substance which gives oxygen or gains hydrogen. Or, it the substance which is reduced itself and oxidizes other.

→ Reducing Agent: It is the substance which gives hydrogen or gains oxygen. Or, it the substance which is oxidized itself and reduces other.

'Oxidation' is the process which involves loss of electrons but reduction is the process which involves gain of electrons.

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Answer 2

Answer:

THERE ARE 5 TYPES OF CHEMICAL REACTION:-

1. COMBINATION REACTION

2. DECOMPOSITION REACTION

3. DISPLACEMENT REACTION

4. DOUBLE DISPLACEMENT REACTION

5. OXIDATION AND REDUCTION

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