Related Questions

'Particulate' air pollutants are finely divided solids and liquids. Which of the following is not a 'particulate'?
A Dust & mists
B Smoke & fumes
C Photochemical smog & soot
D None of these
In reactions involving solids and liquids (where change in volume is negligible), the heat of reaction at constant pressure as compared to that at constant volume is
A More
B Less
C Same
D Unpredictable; depends on the particular reaction
Heat of solution in a system in which both solute and solvent are liquids is termed as
A Heat of solvation
B Heat of hydration
C Standard integral heat of solution
D Heat of mixing
Very fine suspended and colloidal impurities are removed from water by a process called
A Sedimentation
B Coagulation
C Disinfection
D Softening
Traces of solids are removed from, liquid in a
A Classifier
B Clarifier
C Sparkler filter
D Rotary vacuum filter
Melt spinning of polymers involves the forcing of polymer melt through spinnerettes (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the __________ fibres.
A Acrylic
B Polyester
C Nylon 6:6
D Polypropylene
Fine grit present in sewage is removed in the __________ during sewage treatment.
A Grit chamber
B Detritus tank
C Trickling filter
D Skimming tank
In large thermal power stations very fine particulates present in flue gas are removed by
A Wet scrubber
B Bag filter
C Electrostatic precipitators
D Dust catcher
The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as
A Rigid
B Tough
C Ductile
D Plastic
The average of six numbers is 7 . If two of the six numbers are removed , the average of the remaining numbers is 8. What is the sum of the two numbers which were removed?
A 15
B 13
C 11
D 10

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