Metallurgical Engineering
GATE MT topic:basic-laws-chemical-kinetics PYQs
Build your understanding with focused practice from past exam papers.
How to practice topic:basic-laws-chemical-kinetics
Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.
Questions 1–5 of 5. Imported answers require independent review unless marked reviewed.
Question 58
Open questionMTNAT2 marksNeeds review
A non-porous spherical Fe
O
particle of initial radius of
is topochemically reduced by H
, where the reactant-product interface is sharp and spherical, and reaction rate is proportional to the interfacial area. The radius of the unreacted Fe
O
particle after 600
will be ______
.
(Round off to the nearest integer).Given: Rate constant
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 34
Open questionMTNAT1 markNeeds review
The rate constant of a reaction at 400 K is three times the value at 300 K. The activation energy of the reaction in
is __________ (round off to 1 decimal place).Given: Universal gas constant, R = 8.314
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 11
Open questionMTMCQ1 markNeeds review
For a zeroth order chemical reaction, which one of the following is FALSE?
Your answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 54
Open questionMTNAT2 marksNeeds review
Nickel undergoes isothermal oxidation at 800 K for a duration of 400 s resulting in a weight gain of 2 mg cm⁻². The weight gain (mg cm⁻²) after a duration of 1600 s is: ________ (round off to nearest integer).
Assume: Weight gain is proportional to square root of time.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 44
Open questionMTNAT2 marksNeeds review
A metal oxidizes at 1200 K with a parabolic rate constant of
g
·cm
·s
. Time taken for the oxide film to grow to a thickness of 2 μm is ______ s (round off to two decimal places).Given, density of oxide is 6.5 g·cm
.Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer