# Quiz | Chemical Equilibrium

1

Which of the following statements about the equilibrium constant is correct?

It changes with changes in the temperature

It changes by the addition of a catalyst

It always remains the same at different reaction conditions

It increases if the concentration of one of the reactants or products is increased

2

Which of the following statements is correct?

At the equilibrium, sum of [reactant] = sum of [product]

At the equilibrium the forward and reverse reactions still occur

A chemical equilibrium can be attained only starting from a mixture

Chemical equilibrium is a static equilibrium, [reactant] = constant and [product] = constant

3

What is the equilibrium constant expression KC of the reaction: N(g) + 3 H(g) $⇄$ 2 NH(g)?

$\frac{\left[{\mathrm{N}}_{2}\right]\left[{\mathrm{H}}_{2}\right]}{\left[{\mathrm{NH}}_{3}\right]}$

$\frac{\left[{\mathrm{NH}}_{3}\right]}{\left[{\mathrm{N}}_{2}\right]\left[{\mathrm{H}}_{2}\right]}$

$\frac{\left[{\mathrm{N}}_{2}\right]{\left[{\mathrm{H}}_{2}\right]}^{3}}{{\left[{\mathrm{NH}}_{3}\right]}^{2}}$

$\frac{{\left[{\mathrm{NH}}_{3}\right]}^{2}}{\left[{\mathrm{N}}_{2}\right]{\left[{\mathrm{H}}_{2}\right]}^{3}}$

4

What is the equilibrium constant expression KC of the reaction: 2 ICl (s) $⇄$ I(s) + Cl(g)?

[Cl2]

$\frac{\left[{\mathrm{I}}_{2}\right]}{{\left[\mathrm{ICl}\right]}^{2}}$

$\frac{\left[{\mathrm{Cl}}_{2}\right]\left[{\mathrm{I}}_{2}\right]}{{\left[\mathrm{ICl}\right]}^{2}}$

5

How can we increase the total amount of produced Cl2 during the reaction: 2 ICl (s) $⇄$ I(s) + Cl(g)?

By increasing the pressure

By removing the Cl2 as it is formed

By decreasing the volume of the container

6

What happens when the reaction quotient QC is less than the equilibrium constant K?

The reaction will move to the left

The reaction will move to the right

It depends on whether the reaction is endothermic or exothermic

It depends on the reaction conditions