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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