Chemical Reactions and Equations — NCERT Class 10 Science Important Questions & Revision Notes

To determine the rate of reaction

To ensure the law of conservation of mass is obeyed

To predict the products of a reaction

To determine the catalyst used in a reaction

Decomposition reaction

Displacement reaction

Combination reaction

Neutralization reaction

Physical change involves a change in state, while chemical change involves a change in properties

Physical change involves a change in properties, while chemical change involves a change in state

Physical change is reversible, while chemical change is irreversible

Physical change does not involve a change in the substance, while chemical change involves a change in the substance

To increase the rate of reaction

To decrease the rate of reaction

To change the products of the reaction

To speed up the reaction without being consumed or altered

Matter can be created or destroyed in a chemical reaction

The total mass of the reactants is less than the total mass of the products

The total mass of the reactants is greater than the total mass of the products

The total mass of the reactants is equal to the total mass of the products

To balance the equation

To identify the type of reaction

To calculate the yield of the reaction

To determine the equilibrium constant

To separate the reactants and products

To indicate the direction of the reaction

To show the equilibrium constant

To calculate the yield of the reaction

Combination reaction is exothermic, while decomposition reaction is endothermic

Combination reaction involves the formation of a new substance, while decomposition reaction involves the breakdown of a substance

Combination reaction is a physical change, while decomposition reaction is a chemical change

Combination reaction occurs at high temperature, while decomposition reaction occurs at low temperature

To catalyze the reaction

To participate in the reaction

To maintain the charge balance

To increase the reaction rate

Reversible reaction is faster than irreversible reaction

Reversible reaction involves the formation of a new substance, while irreversible reaction involves the breakdown of a substance

Reversible reaction can proceed in both forward and backward directions, while irreversible reaction can only proceed in one direction

Reversible reaction occurs at high temperature, while irreversible reaction occurs at low temperature