5°C and 1 kgf/cm2.
– 20°C and 1 kgf/cm2.
0°C and 1 kgf/cm2.
0°C and 3 kgf/cm2.
✅ The correct answer is option A.
Chemical Engineering MCQs
The free energy change for a chemical reaction is given by (where, K = equilibrium constant)
A. RT lnK
B. -RT lnK
C. -R lnK
D. T lnK
✅ The correct answer is option B.
Equilibrium constant decreases as the temperature
A. Increases, for an exothermic reaction
B. Decreases, for an exothermic reaction
C. Increases, for an endothermic reaction
D. None of these
✅ The correct answer is option A.
The total change in the enthalpy of a system is independent of the
A. Number of intermediate chemical reactions involved
B. Pressure and temperature
C. State of combination and aggregation in the beginning and at the end of the reaction
D. None of these
✅ The correct answer is option A.
The energy of activation of exothermic reaction is
A. Zero
B. Negative
C. Very large compared to that for en-dothermic reaction
D. Not possible to predict
✅ The correct answer is option D.
The expression for entropy change given by, ΔS = – nR ln (P₂/P₁), holds good for
A. Expansion of a real gas
B. Reversible isothermal volume change
C. Heating of an ideal gas
D. Cooling of a real gas
✅ The correct answer is option B.
Polymethyl methacrylate (PMMA) is known as
bakelite
teflon
perspex
nylon-6
✅ The correct answer is option C.
Which of the following is not a thermoplastic material ?
Epoxy polymer
PVC
Polystyrene
Polythene
✅ The correct answer is option A.
Polythene is a/an
addition polymerisation product.
condensation polymerisation product.
thermosetting material.
none of these.
✅ The correct answer is option A.
Polystyrene is a __________ plastic at room temperature.
ductile
brittle
malleable
none of these
✅ The correct answer is option B.