Question 1

2A + 3B <----> 2AB

The forward reaction forms the substance __________.

Accepted Answer

AB

Answer

A+B

Answer

B

Answer

A

Question 2

At what time the reaction reached equilibrium?

Accepted Answer

t2

Answer

t3

Answer

t4

Answer

t1

Question 3

Identify the labels (a) and (b) on the graph.

Accepted Answer

a is concentration of reactants and b is the concentration of product

Answer

a is concentration of product and b is the concentration of reactant

Answer

a the mass of reactants and b is the mass of product

Answer

a is the volume of reactants and b is the volume of product

Question 4

Which of the two graphs reaches equilibrium?

Accepted Answer

Both of them

Answer

The right one.

Answer

The left one.

Answer

Neither.

Question 5

What are the two factors to look for when determining if the reaction is at equilibrium?

Accepted Answer

Forward and reverse reaction rates are equal and concentration is constant

Answer

Forward reaction rate is faster than the reverse and concentrations are equal

Answer

Forward and revers reaction rates are equal and concentration is equal

Answer

Forward reaction rate is faster than the reverse and concentration is equal

Question 6

When the rate of the forward reaction is equal to the rate of backward reaction, the system is said to be in?

Accepted Answer

Chemical Equilibrium

Answer

Stoichiometry

Answer

Chemical Reaction

Answer

Chemical Balance

Question 7

Which of the following is the condition needed to establish the equilibrium?

Accepted Answer

All of the above

Answer

All reactants and products should be in closed system

Answer

Products and reactants should be in constant dynamic motion

Answer

Constant Temperature

Question 8

Which of the following is NOT true at equilibrium?

Accepted Answer

The concentration of the reactants is equal to the concentration of the products.

Answer

The concentrations of reactants and products do not change.

Answer

The forward and reverse reactions proceed at the same rate.

Answer

The forward and reverse reactions continue to occur.

Question 9

Which of the following equations are correctly balanced?

Accepted Answer

6CO₂ + 6H₂O ---> C₆H₁₂O₆ + 6O₂

Answer

12CO₂ + H₂O ---> C₆H₁₂O₆ + O₂

Answer

CO₂ + 9H₂O ---> C₆H₁₂O₆ + O₂

Answer

CO₂ + H₂O ---> 3C₆H₁₂O₆ + O₂

Question 10

Is the following reaction balanced?NaHCO₃ --> Na₂CO₃ + H₂O + CO₂

Accepted Answer

false

Answer

true

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