FBISE, NCP & NBF-aligned resources for Classes 9–12
Browse by Class
Browse by Type
Chemistry Chapter 9 : Test Yourself
1 / 5
Which is true about the equilibrium state?
Reasoning: At equilibrium, reactions do not stop; instead, both forward and backward reactions occur at equal rates, so no net change happens.
2 / 5
When a mixture of H₂ and I₂ is sealed in a flask and temperature is kept at 25°C, following equilibrium is established.H₂(g)+I₂(g) ⇌ 2HI(g)Which substance or substances will be present in the equilibrium mixture?
Reasoning: At equilibrium, both reactants and products are always present because the reaction is reversible.
3 / 5
Concentration of reactants and products at equilibrium remains unchanged if:
Reasoning: Equilibrium is maintained only when temperature, pressure / volume, and concentrations remain constant.
4 / 5
Which of the following does not happen, when a system is at equilibrium state?
Reasoning: At equilibrium, reactions are still occurring; they do not stop, they just proceed at equal rates.
5 / 5
In an irreversible reaction equilibrium is:
Reasoning: Irreversible reactions proceed in one direction only, so no backward reaction occurs, meaning equilibrium cannot form.
Your score is
Restart quiz
