A. Should have high porosity
B. Should be brittle
C. Must contain moderate quantities of ash, moisture, sulphur and volatile matters
D. Should have low fusion point of its ash
CHEMICAL ENGINEERING
In step growth polymerisation, condensation occurs in a stepwise manner with or without the elimination of smaller molecules. An example of step growth polymerisation product is________________?
A. Terylene
B. Polybutadiene
C. PVC
D. Polypropylene
Boiler tube size is specified by its thickness and _____________________ diameter ?
A. Outside
B. Inside
C. Mean
D. None of these
Screen efficiency is______________________?
A. Recovery/rejection
B. Recovery
C. Rejection
D. None of these
Liquid delivery by centrifugal pump starts, only when the head developed by it is equal to the ____________ head?
A. Manometric
B. Total
C. Static
D. Friction
Raoult’s law does not apply, when the___________________?
A. Size of component molecules are not equal
B. Attractive forces between like and unlike molecules in the solution are approximately equal
C. Component molecules are non-polar
D. Chemical combination or molecular association between unlike molecules takes place in the
formation of solution
Radiant energy received by a body is proportional to (where, d = the distance between the object emitting radiation and that receiving it.) ?
A. √d
B. d
C. d2
D. d1.5
Which of the following terms of Vander Walls equation of state for a non-ideal gas accounts for intermolecular forces ?
A. RT
B. P + (a/V2)
C. (V – b)
D. 1/RT
Pick out the wrong statement?
A. Catalytic activity of enzyme catalysed reactions which is affected by temperature, pH value &
chemical agents, is maximum at a temperature of about 45°C
B. Most of the enzyme catalysed reactions involve at least two substrates
C. Enzymes help in increasing the activation energy of the reaction
D. Equilibrium concentrations in enzyme catalysed reactions can be calculated by using the
thermodynamic properties of substrates & products
Leidenfrost point is a term concerned with the____________________?
A. Condensation of the saturated vapor on a cold surface
B. Concentration of a corrosive solution by evaporation
C. Heat transfer between two highly viscous liquids
D. Boiling of a liquid on a hot surface
