Concentration and Chemical Equilibrium

Q.

What affects the position of equilibrium?

Q.

What influence does an increase in product concentration have on the system which is in equilibrium?

1. Equilibrium will shift to increase the reactant concentration.
2. A forward reaction will be favored.
3. A backward reaction will be favored.
4. Equilibrium will shift to decrease the reactant concentration.

Q.

For a reversible system, when the concentration of the reacting system in equilibrium is increased then

1. a forward reaction will take place.

2. a backward reaction will take place.

3. new equilibrium mixture will contain a higher concentration of the reactant.

4. new equilibrium mixture will contain a higher concentration of the product.

Q.

What influence does a decrease in reactant concentration have on the system which is in equilibrium?

1. Equilibrium will shift to increase the product concentration.

2. A forward reaction will be favored.

3. A backward reaction will be favored.

4. Equilibrium will shift to increase the reactant concentration.

Q.

For a system in equilibrium, if the concentration of the reacting species is increased then the system will readjust itself to decrease the reactant concentration favoring a backward reaction.

1. True

2. False

Q.

$\text{A + B}\leftrightharpoons \text{C + D}$

The above reversible reaction is in equilibrium. What will be the effect on chemical equilibrium if the concentration of D is decreased in the system?

1. A backward reaction will be favoured.

2. Equilibrium will shift to increase the reactant concentration.

3. Equilibrium will shift to increase the product concentration.

4. A forward reaction will be favoured.

Q. What influence does an increase in product concentration have on the system which is in equilibrium?

1. Equilibrium will shift to increase the reactant concentration.
2. A forward reaction will be favored.
3. A backward reaction will be favored.
4. Equilibrium will shift to decrease the reactant concentration.

Q.

For a reversible system, when the concentration of the reacting system in equilibrium is increased then

1. a forward reaction will take place.

2. a backward reaction will take place.

3. new equilibrium mixture will contain a higher concentration of the reactant.

4. new equilibrium mixture will contain a higher concentration of the product.

Q. For a reversible system, when the concentration of the reacting system in equilibrium is increased then

1. a forward reaction will take place.
2. a backward reaction will take place.
3. new equilibrium mixture will contain a higher concentration of the reactant.
4. new equilibrium mixture will contain a lesser concentration of the product.

Q. For a reversible system, when the concentration of the reacting system in equilibrium is increased then

1. a forward reaction will take place.
2. a backward reaction will take place.
3. new equilibrium mixture will contain a higher concentration of the reactant.
4. new equilibrium mixture will contain a lesser concentration of the product.

Q.

What influence does an increase in reactant concentration have on the system which is in equilibrium?

1. Equilibrium will shift to increase the product concentration.

2. A forward reaction will be favoured.

3. A backward reaction will be favoured.

4. Equilibrium will shift to decrease the reactant concentration.

Q.

What influence does an increase in product concentration have on the system which is in equilibrium?

1. Equilibrium will shift to increase the reactant concentration.
2. A forward reaction will be favored.
3. A backward reaction will be favored.
4. Equilibrium will shift to decrease the reactant concentration.

Q.

During the formation of ammonia, the rate of forward reaction will increase if

1. hydrogen is removed

2. ammonia is added

3. ammonia is removed

4. hydrogen is added

Q.

$\text{A + B}\leftrightharpoons \text{C + D}$

The above reversible reaction is in equilibrium. What will be the effect on chemical equilibrium if the concentration of D is decreased in the system?

1. A backward reaction will be favoured.

2. Equilibrium will shift to increase the reactant concentration.

3. Equilibrium will shift to increase the product concentration.

4. A forward reaction will be favoured.

Q.

During the formation of ammonia, the rate of backward reaction will increase if

1. nitrogen is added

2. nitrogen is removed

3. ammonia is added

4. ammonia is removed