A. St = f/2 (Correct)
B. St = f/4
C. St = 4f
D. St = f1/2
Chemical Engineering / Q&A
The extensive properties are____________________?
A. Volume, mass and number of moles
B. Free energy, entropy and enthalpy
C. Both A. and B (Correct)
D. None of these
For an isothermal second order aqueous phase reaction, A → B, the ratio of the time required for 90% conversion to the time required for 45% conversion is____________________?
A. 2
B. 4
C. 11 (Correct)
D. 22
In an ideal solution, the activity of a component equals its __________________?
A. Mole fraction (Correct)
B. Fugacity at the same temperature and pressure
C. Partial pressure
D. None of these
Nickel base alloys with ______________ are known as monel metal?
A. Zinc
B. Tin
C. Copper (Correct)
D. Molybdenum
Gunmetal and bronze are not corroded by the action of__________________?
A. Wet chlorine
B. Synthetic detergent solution (Correct)
C. Hydrochloric acid (10%)
D. Nitric acid (< 25%)
Thermal pollution of water increases its toxicity and oxidation of oxygen demanding waste besides favouring bacterial growth. A rise in water temperature by 10°C, doubles the toxic effects of _____________ present in it?
A. Coal ash
B. Potassium cyanide (Correct)
C. Ortho-xylene
D. None of these
The loss of strength in compression which occurs, when there is a gain of strength in tension due to over loading is called__________________?
A. Bauschinger effect (Correct)
B. Hooke’s effect
C. Hysteresis
D. Relaxation
Beryllia (which is used in making crucibles for melting uranium & thorium) is superior to alumina in all respects for high temperature (> 1900°C ) use, except______________?
A. Cost (Correct)
B. Electrical conductivity
C. Thermal conductivity
D. Fusion point
Naphthenic acid is represented by ___________________?
A. CnH2n+2O2
B. CnH2n-2O2 (Correct)
C. CnH2n+2O2 (n ≥ 6)
D. CnH2n+6O2 (n ≤ 6)