Equilibrium state MCQ Basic level

Dear Readers,

Compared to other sections, Chemistry is considered to be the most scoring section. If prepared thoroughly, chemistry can help students to secure a meritorious position in the exam. These questions are very important in achieving your success in Exams after 12th.

Q1.In any chemical reaction, equilibrium is supposed to be establish when

  •  Mutual opposite reactions undergo
  •  Concentration of reactants and resulting products are equal
  •  Velocity of mutual reactions become equal
  •   The temperature of mutual opposite reactions becomes equal

Velocity of mutual reactions become equal

Q2. When rate of forward reaction becomes equal to backward reaction, this state is termed as

  •  Chemical equilibrium
  •  Reversible state
  •  Equilibrium
  •   All of these

All of these

Q3. In chemical reaction A ⇌ B, the system will be known in equilibrium when

  •  A completely changes to B
  •  50% of A changes to B
  •  The rate of change of A to B and B to A on both the sides are same
  •   Only 10% of A change to B

The rate of change of A to B and B to A on both the sides are same

Q4. Select the correct statement from the following

  •  Equilibrium constant changes with addition of catalyst
  •  Catalyst increases the rate of forward reaction
  •  The ratio of mixture at equilibrium does not change by catalyst
  •  Catalyst are active only in solution

The ratio of mixture at equilibrium does not change by catalyst

Q5. A chemical reaction is at equilibrium when

  •  Reactants are completely transformed into products
  •  The rates of forward and backward reactions are equal
  •  Formation of products is minimised
  •  Equal amounts of reactants and products are present

The rates of forward and backward reactions are equal

Q6. What would happen to a reversible reaction at equilibrium when an inert gas is added while the volume remains unchanged

  •  More of the product will be formed
  •  Less of the product will be formed
  •  More of the reactants will be formed
  •  It remains unaffected

It remains unaffected

Q7. Which of the following statements regarding a chemical equilibrium is wrong

  •  An equilibrium can be shifted by altering the temperature or pressure
  •  An equilibrium is dynamic
  •  The same state of equilibrium is reached whether one starts with the reactants or the products
  •  The forward reaction is favoured by the addition of a catalyst

The forward reaction is favoured by the addition of a catalyst

Q8.  In a chemical reaction equilibrium is established when

  •  Opposing reaction ceases
  •  Concentration of reactants and products are equal
  •  Velocity of opposing reaction is the same as that of forward reaction
  •   Reaction ceases to generate heat

Velocity of opposing reaction is the same as that of forward reaction

Q9. In the given reaction N2+O2⇌2NO, equilibrium means that

  •  Concentration of reactants is changing where as concentration of products is constant
  •  Concentration of all substances is constant
  •  Concentration of reactants is constant where as concentration of products is changing
  •  Concentration of all substance is changing

Concentration of all substances is constant

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