Quick Quiz
Questions ▼
Chemical Kinetics Class 12 MCQ. We covered all the Chemical Kinetics Class 12 MCQ in this post for free so that you can practice well for the exam.
Install our MCQTUBE Android app from the Google Play Store and prepare for any competitive government exams for free.
These types of competitive MCQs appear in exams like SSC CGL, CHSL, JE, MTS, Stenographer, CPO, Railway Group-D, NTPC, ALP, JE, RPF, Tech, Bank, Delhi Police Constable, UP Lekhpal, DSSSB, DDA ASO, BPSC Teaching, Defence, UPSSSC, UPSC (Pre), UPP, SI, UPTET, UPPCS, BPSC, BSSC, SBI, IBPS, LIC, State PCS, CDS, NDA, Assistant Commandant, and other Competitive Examinations, etc.
We have divided the complete NEET syllabus into several small posts on our website for your convenience.
You will get their respective links in the related posts section provided below.
Related Posts:
MCQ on Chemical Kinetics for NEET Students
A reactant has an initial concentration of 1.386 mol dm³ and becomes half in 40 seconds for a first-order reaction and in 20 seconds for a zero-order reaction under identical conditions. By what factor must the zero-order rate constant be multiplied to match the first-order rate constant?
(a) 0.5
(b) 1
(c) 1.5
(d) 2
Option a – 0.5
A first-order reaction reduces the concentration of a substance from 0.8 M to 0.4 M in 15 minutes. How long will it take for the concentration to drop from 0.1 M to 0.025 M?
(a) 60 minutes
(b) 15 minutes
(c) 7.5 minutes
(d) 30 minutes
Option d – 30 minutes
As per Maxwell-Boltzmann energy distribution, what remains constant when temperature rises?
(a) The number of molecules with the most probable energy increases
(b) The area under the curve increases
(c) The total area under the curve remains unchanged
(d) The area under the curve becomes smaller
Option c – The total area under the curve remains unchanged
For a first-order reaction X → Y, 0.8 moles of X form 0.6 moles of Y in 1 hour. How long will it take for 0.9 moles of X to yield 0.675 moles of Y?
(a) 1 hour
(b) 1.5 hours
(c) 2.5 hours
(d) 3 hours
Option a – 1 hour
In a reaction involving A and B, the rate drops by a factor of 4 when B’s concentration is doubled. What is the reaction order with respect to B?
(a) 2
(b) -2
(c) 1
(d) -1
Option b – -2
In a first-order process, the time needed for 99% completion is how many times that for 90% completion?
(a) Same
(b) Twice
(c) Three times
(d) Half
Option b – Twice
If the half-life of a reaction is inversely proportional to the square of the reactant’s initial concentration, what is the reaction’s order?
(a) 0
(b) 1
(c) 2
(d) 3
Option d – 3
A 10 g sample of a radioactive substance decays to 1.25 g in 12 years. What is the half-life of this isotope?
(a) 24 years
(b) 4 years
(c) 3 years
(d) 8 years
Option b – 4 years
A compound decomposes thermally following first-order kinetics. If 50% of it decomposes in 126 minutes, how long will it take for 90% to break down?
(a) About 315 minutes
(b) About 601 minutes
(c) About 419 minutes
(d) About 532 minutes
Option c – About 419 minutes
A reaction has a temperature coefficient of 2. If the temperature rises from 30 °C to 70 °C, how much does the reaction rate increase?
(a) 4 times
(b) 8 times
(c) 16 times
(d) 32 times
Option c – 16 times
The rate constant and rate of reaction have the same units for which reaction order?
(a) Zero
(b) First
(c) Second
(d) Third
Option a – Zero
We covered all the chemical kinetics class 12 MCQ above in this post for free so that you can practice well for the exam.
Check out the latest MCQ content by visiting our mcqtube website homepage.
Also, check out:
