All the hydrolytic reactions are:
Correct answer: D. Pseudo-first order
- A. First order
- B. Third order
- C. Second order
- D. Pseudo-first order
Explanation
Option D, "Pseudo-first order," is correct for hydrolytic reactions. Hydrolytic reactions can involve multiple steps and species, making it difficult to define a fixed order of reaction. In some cases, one of the reactants (often water) is present in large excess, effectively keeping its concentration nearly constant. This leads to a situation where the reaction appears to be first-order with respect to the other reactant. This is why hydrolytic reactions are often treated as pseudo-first order, meaning they behave as if they are first-order reactions even though they may not strictly meet the criteria for a true first-order reaction. Options A, B, and C, which refer to first, third, and second order reactions respectively, are not generally applicable to hydrolytic reactions due to their complex nature involving multiple species and steps.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Reaction Kinetics
Reaction kinetics relates reaction rate to concentration, temperature, surface area and catalysts. Questions cover rate laws, reaction order, rate constants, activation energy and the activated complex, including how a catalyst lowers the activation energy without changing the overall energy change or equilibrium position.
Practise Reaction Kinetics
573 free Reaction Kinetics 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 Reaction Kinetics questions
The radioactive disintegration of 23892U is:
A substance that alters the rate of chemical reaction without being consumed is reaction is called:
Chemical kinetics deals with the study of:
For a hypothetical reaction: x2 + y2 → 2xy, the proposed mechanism is: (i) x2 → x + x (Fast) (ii) x + y2 → xy + y (slow) (iii) x + y → xy (Fast) The order of reaction will be:
A first order reaction has k = 102 Sec-1, the time required to convert 20 g of it to 5 g will be:
Addition of catalyst during a chemical reaction alters: