4821. Which of the following behaves most closely like an ideal gas?
A. He
B. N₂
C. O₂
D. H₂
✅ The correct answer is option A.
Chemical Engineering
Prepare with the best Chemical Engineering MCQs with answers and detailed explanations for exams and job tests. Our collection covers key topics such as chemical process calculations, thermodynamics, fluid mechanics, heat transfer, mass transfer, reaction engineering, instrumentation, and plant design. These Chemical Engineering multiple-choice questions are ideal for students, competitive exam aspirants, and professionals preparing for NTS, PPSC, FPSC, PEC exams, GATE, university entry tests, and job interviews. Practice online with updated Chemical Engineering MCQs to strengthen your concepts and improve technical problem-solving skills.
4822. The work done in isothermal compression compared to that in adiabatic compression will be
A. Less
B. More
C. Same
D. More or less depending upon the extent of work done
✅ The correct answer is option B.
4823. Those solutions in which there is no volume change upon mixing the components in the liquid state and which, when diluted do not undergo any heat change (i.e. heat of dilution is zero), are called __________ solutions.
A. Ideal
B. Real
C. Isotonic
D. None of these
✅ The correct answer is option A.
4824. The change in Gibbs freee energy for vaporisation of a pure substance is
A. Positive
B. Negative
C. Zero
D. May be positive or negative
✅ The correct answer is option C.
4825. Mastication of rubber means
its softening.
a treatment to retard its deterioration due to oxidation.
improving its curing rate.
depression of its freezing point.
✅ The correct answer is option A.
4826. Vulcanisation of rubber
decreases its tensile strength.
increases its ozone & oxygen reactivity.
increases its oil & solvent resistance.
converts its plasticity into elasticity.
✅ The correct answer is option D.
4827. Softening point of high density polythene is about __________ °C.
85
135
165
205
✅ The correct answer is option B.
4828. Styrene which is a monomer for the production of polystyrene, is commercially produced by the
catalytic dehydrogenation of ethyl benzene.
dehydration of ethyl alcohol followed by hydrogenation.
reacting ethylene oxide with acetal-dehyde.
fermentation of starch.
✅ The correct answer is option A.
4829. Which of the following is not present in bagasse fibre ?
Cellulose
Lignin
Pentogens
None of these
✅ The correct answer is option D.
4830. Caprolactum, a raw material for the manufacture of nylon-6, is produced from
phenol
naphthalene
benzene
pyridine
✅ The correct answer is option C.