A. H₂
B. He
C. Ar
D. O₂
✅ The correct answer is option B.
Basic Chemical Engineering MCQs
Which of the following metals occurs in nature in their free metallic state?
A. Au & Ag
B. Pb & Zn
C. Cu & Ni
D. None of these
✅ The correct answer is option D.
It is possible to form martensite
A. Sometimes by cold working
B. Sometimes without nucleation
C. Sometimes by gas quenching
D. Only in iron based alloys
✅ The correct answer is option D.
Which of the following has the highest value of refractive index?
A. Brine (sea water)
B. Diamond
C. Distilled water
D. Glass
✅ The correct answer is option B.
A __________ type pressure sensing element is commonly used in aneroid barometer.
A. Capsule
B. Bellow
C. Spiral tube
D. Flat diaphragm
✅ The correct answer is option A.
Which of the following materials has the poorest electrical conductivity?
A. Carbon
B. Aluminium
C. Silver
D. Stainless steel
✅ The correct answer is option A.
The escape velocity of a body on earth which is independent of its mass is about __________ km/second.
A. 3
B. 7
C. 11
D. 15
✅ The correct answer is option C.
In an amorphous material, atoms defy any definite atomic structure and exist in random pattern just like in liquid. Which of the following is an amorphous material?
A. Tin
B. Lead
C. Zinc
D. Glass
✅ The correct answer is option D.
Normalising of an object does not
A. Refine coarse grain structure obtained during hot working
B. Improve ductility
C. Improve yield strength
D. Improve machanical properties
✅ The correct answer is option B.
The cathode in an electrochemical cell always carries
A. Negative charge
B. Positive charge
C. Zero charge
D. Positive or negative charge depending upon the nature of the cell
✅ The correct answer is option A.