EVERYDAY SCIENCE

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PHYSICAL SCIENCES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A system in chemical equilibrium
A
responds to oppose change
B
has particles that do not move
C
is undergoing visible change
D
is stable only when all reactants have been used
Explanation: 

Detailed explanation-1: -If a chemical reaction is at equilibrium and experiences a change in pressure, temperature, or concentration of products or reactants, the equilibrium shifts in the opposite direction to offset the change.

Detailed explanation-2: -A chemical system at equilibrium can be temporarily shifted out of equilibrium by adding or removing one or more of the reactants or products. The concentrations of both reactants and products then undergo additional changes to return the system to equilibrium.

Detailed explanation-3: -If an equilibrium is disturbed by increasing the concentration of a product, then the system will oppose the increase and act to decrease the concentration of the product. It does this by increasing the rate at which the product turns into reactants, and favouring the reverse reaction, increasing its rate.

Detailed explanation-4: -As a system approaches equilibrium, both the forward and reverse reactions are occurring. At equilibrium, the forward and reverse reactions are proceeding at the same rate. Once equilibrium is achieved, the amount of each reactant and product remains constant.

Detailed explanation-5: -All reactions tend towards a state of chemical equilibrium, the point at which both the forward process and the reverse process are taking place at the same rate. Since the forward and reverse rates are equal, the concentrations of the reactants and products are constant at equilibrium.

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