Question

question:-

a) Define a balanced chemical equation. why should an equation should be balanced.

b) write the balanced for the following reactions :

i) phosphorus burns in presence of chlorine to form phosphorus pentachloride.

ii) Burning of natural gas .

iii) The process of respiration.

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Good Answer need

For class 10th ​

Answer 1

Answer:

1)A balanced chemical reaction is an equation that has equal numbers of each type of atom on both sides of the arrow.

A chemical equation is a written symbolic representation of a chemical reaction. The reactant chemical(s) are given on the left-hand side and the product chemical(s) on the right-hand side. The law of conservation of mass states that atoms can neither be created nor destroyed in a chemical reaction, so the number of atoms that are present in the reactants has to balance the number of atoms that are present in the products.

2)(1)The reaction of Phosphorus burns in chlorine gas to give phosphorus pentachloride. The balanced formula of phosphorus burns in chlorine gas to form phosphorus pentachloride:

4P4 + 10Cl2 → 4PCl5

2)(2)The combustion of natural gas is an example of exothermic reaction.

CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (g)

Respiration is also an exothermic reaction involving the biological oxidation reaction of food nutrients with oxygen to form carbon dioxide and water with the release of chemical energy.

2)(3)Aerobic respiration takes place in the mitochondria and requires oxygen and glucose, and produces carbon dioxide, water, and energy. The chemical equation is C6H12O6 + 6O2 → 6CO2 + 6H2O (glucose + oxygen -> carbon dioxide + water).