The unit f Kc or the system N2O4 g ----------- 2NO2 g
Correct answer: C. mole dm-3
- A. dimension (i.e., with no unit)
- B. mole dm3
- C. mole dm-3
- D. mole2 dm3
Explanation
The correct unit for the reaction N2O4 g → 2NO2 g is mole dm-3, as it represents the concentration of the substances involved in the reaction. This unit accounts for the balanced equation and the stoichiometry of the reaction. The other options are incorrect because they either wrongly assume no unit, combine units incorrectly, or misapply the units based on the reaction's stoichiometry.
This question appeared on the ETEA MDCAT 2006 paper, which you can sit online with every answer explained.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Reversible Reactions
A reversible reaction proceeds in both forward and backward directions, so reactants and products continue changing until dynamic equilibrium is established. The topic covers the meaning of equilibrium, the equality of forward and reverse rates, and how concentration, pressure and temperature disturb equilibrium, which is separate from the rate at which equilibrium is reached.
Practise Chemical Equilibrium
625 free Chemical Equilibrium MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Reversible Reactions questions
Consider the following equation: N2+O2 _ 2NO. The partial pressure (ln atm) of N2 under normal atmospheric pressure
At constant temperature, as the pressure of a gaseous mixture in equilibrium increases, the equilibrium constant
In contact process, to which substance are adequate quantities of water added to convert it to sulphuric acid?
For a reversible reaction to reach on equilibrium state the reaction said to be carried out in
When does a reaction attain equilibrium :
The value of K (equilibrium constant) for a reaction?