The Question is from NEET guide , and it was created by the author Mr. S M HUSSAIN

Question

A chemical equilibrium is established when:

Mr. S M HUSSAIN · Accepted Answer

## CORE INFORMATION
✓ **Answer**: B
## CONCEPT FRAMEWORK
 **Primary Concept**: Chemical Equilibrium
 **Related Topics**: Reaction rates, Le Chatelier's principle, Equilibrium constant
 **Prerequisites**: Understanding of forward and reverse reactions.
## SOLUTION PATHWAY
**Given Information**:
The question asks for the condition that defines chemical equilibrium.
**Method & Steps**:
1. Understanding Reaction Rates:
  Reasoning: In a reversible reaction, reactants form products (forward reaction), and products form reactants (reverse reaction). Initially, the forward reaction rate is faster.
  Formula/Rule:  No specific formula is needed here, it's a conceptual understanding.
2. Equilibrium Condition:
  Working: As the reaction proceeds, the concentration of reactants decreases, slowing the forward reaction. Simultaneously, the concentration of products increases, speeding up the reverse reaction.  Equilibrium is reached when these rates become equal.
  Key Point: Equilibrium doesn't mean equal concentrations of reactants and products; it means equal rates.
3. Final Step:
  Result: The rate of the forward reaction equals the rate of the reverse reaction at equilibrium.
  Verification: This definition aligns with the fundamental understanding of chemical equilibrium.
## OPTION ANALYSIS
A :x: All reactants are consumed. This describes a reaction going to completion, not equilibrium.  In equilibrium, both reactants and products are present.
B ✓: The rate of the forward reaction is equal to the rate of the reverse reaction. This is the correct definition of chemical equilibrium.
C :x: The concentration of reactants is equal to the concentration of products. While this might be true in some cases at equilibrium, it's not a defining characteristic.  Equilibrium is defined by equal rates, not equal concentrations.
D :x: The temperature of the system reaches room temperature. Temperature is a factor influencing equilibrium, but it's not the defining characteristic. Equilibrium can be established at any temperature.
## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing equilibrium with equal concentrations: Remember that equal rates, not concentrations, define equilibrium.
  2.Thinking equilibrium means the reaction stops: The forward and reverse reactions continue at equal rates at equilibrium, not ceasing completely.
 **Quick Tips**:
  1.Visualize the rates of the forward and reverse reactions over time to understand how they reach equilibrium.
  2.Remember the analogy of a crowded room: people entering (forward reaction) and leaving (reverse reaction) at the same rate.

Mr. S M HUSSAIN · Answer

All reactants are consumed.

Mr. S M HUSSAIN · Answer

The correct Option is "The rate of the forward reaction is equal to the rate of the reverse reaction."

Mr. S M HUSSAIN · Answer

The concentration of reactants is equal to the concentration of products.

Mr. S M HUSSAIN · Answer

The temperature of the system reaches room temperature.

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