Practice Chemical Equilibrium Multiple Choice Questions with Answers Quiz-1

Q.1.

For the following reaction: H2(g) + Cl2 (g) ↔ 2HCl(g), calculate the concentration of HCl when Keq= 2.3x10-[H2]= 0.0056mol, [Cl2]= 0.0048mol.

6.2 x 10-10 M
2.5 x 10-5 M
1.1 M
1.2 M

Q.2.

What is the correct formula of relationship between Kc and Kp?

Kp=Kc(RT)ΔnKp=Kc\left(RT\right)^{\Delta n}Kp=Kc(RT)Δn
Kc=Kp(RT)ΔnKc=Kp\left(RT\right)^{\Delta n}Kc=Kp(RT)Δn
Kp=(RT)ΔnKp=\left(RT\right)^{\Delta n}Kp=(RT)Δn
Kp×Kc=(RT)ΔnKp\times Kc=\left(RT\right)^{\Delta n}Kp×Kc=(RT)Δn

Q.3.

What kind of equilibrium does the reaction below show?H2(g) +I2(g) ↔ 2HI(g)

Heterogeneous equilibrium, all the reactants and products are in the same physical state.
Homogeneous equilibrium, all the reactants and products are in the same physical state.
Heterogeneous equilibrium, the reactants and products are present in more than one physical state
Homogeneous equilibrium, the reactants and products are present in more than one physical state

Q.4.

+ <----> 2ABThe forward reaction forms the substance __________.

A
B
AB
A + B

Q.5.

For the reaction...heat + N+ O↔ 2NOIf the heat is added to the chemical system, the equilibrium will shift _______.

left
right
left and right
neither left nor right

Q.6.

For the reaction...N2 (g) + 3 H2 (g) <−> 2 NH3 (g)If the pressure in the system is increased, which substance will increase in concentration?

N2
H2
N2 and H2
NH3

Q.7.

For the reaction...N2 (g) + 3 H2 (g) <−> 2 NH3 (g)If the pressure in the system is increased, _______ reaction will be favored.

the forward
the reverse
neither

Q.8.

For the reaction...H2 (g) + Cl2 (g) <−> 2HCl (g) + heatIf the pressure in the system is increased, the equilibrium will _______.

shift left
shift right
not shift

Q.9.

For the reaction...H2 (g) + Cl2 (g) <−> 2HCl (g) + heatIf the temperature is cooled, the _________ reaction will be favored.

forward
reverse
forward and reverse

Q.10.

For the reaction...heat + N+ O<−> 2NOIf O2 is removed, the concentration of N2 will _______.

increase
decrease
remain the same
double

Q.11.

For the reaction...SO2 + O2 <−> SO3If the concentration of O2 is decreased, the equilibrium of the reaction will shift ___________.

left
right
left and right
neither left nor right

Q.12.

For the reaction...SO2 + O2 <−> SO3If the equilibrium shifts to the right, the concentration of O2 will ___________.

increase
decrease
remain the same
double

Q.13.

For the reaction...SO2 + O<−> SO3If the concentration of SO2 is increased, the equilibrium of the reaction will shift ___________.

left
right
left and right
neither left nor right

Q.14.

+ <----> 2ABThe reverse reaction forms the substance __________.

A
B
AB
A + B

Q.15.

+ <----> 2ABThe reverse reaction points towards the __________.

left
right
up
down

Q.16.

+ <----> 2ABThe forward reaction points towards the __________.

left
right
up
down

Q.17.

What is the equilibrium-constant expression for CO2(g) + H2(g) ↔ CO(g) + H2O(l)

Kc= [CO][H2O] / [CO2][H2]
Kc= [CO2][H2] / [CO]
Kc= [CO2][H2] / [CO][H2O]
Kc= [CO] / [CO2][H2]

Q.18.

Such reactions which continue in both directions are called:

Irreversible reactions
Reversible reactions
Non-reactive reactions
dynamic reactions

Q.19.

A complete reaction is in which:

All the reactants convert into products
All the reactants do not convert into products
Half reactants convert into products
only 10% reactants convert into products

Q.20.

2SO2(g)+O2(g)⇌2SO3(g)Adding SO2(g) will

shift equilibrium right
shift equilibrium left
increase rate of reaction
have no change

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