9th Class Chemistry Chapter 6 TestEquilibria

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. The direction of irreversible reaction is:

   1. Reverse

   2. Forward

   3. Both

   4. None of these

2. A reverse reaction is one that:

   1. Proceeds from left to right

   2. In which reactants react to form products

   3. Slows down gradually

   4. Speeds up gradually

3. The formation of ammonia is: 

   1. Exothermic 

   2. Endothermic 

   3. Both

   4. None of these  

4. What is true about reversible reaction:

   1. It never goes to completion

   2. Burning of coal is reversible reaction

   3. Rate of reaction does not effected by temperature

   4. None of these

5.  During the formation of ammonia the pressure will be kept: 

   1. 200atm

   2. 2500atm

   3. 3000atm

   4. All of these

6. Nitrogen dioxide changes into brown colour at …….temperature 

   1. 373k

   2. 200C 

   3. 2000k                          

   4. 2000k

7. In a dynamic equilibrium, which of the following is true?

   1. Forward and reverse reactions occur at different rates

   2. Forward and reverse reactions occur at the same rates

   3. Reactions stops

   4. None of these

8. The following reaction is performed in a closed vessel. . How the equilibrium will be affected if to increase the pressure?

   1. The forward reaction will be favoured

   2. The backward reaction will be favoured

   3. No effect on backward reaction

   4. No effect on forward or backward reaction

9. By decreasing the temperature the direction of equilibrium reaction is: 

   1. Backward

   2. Forward

   3. Both

   4. None of these

10. The reaction which moves both forward and reverse direction are: 

    1. Irreversible reaction

    2. Reversible reaction

    3. Acid reaction

    4. None of these