The ratio of oxygen available to the oxygen required for stabilization of sewage is called
A.biochemical oxygen demand
B.relative stability
C.bacterial-stability factor
D.oxygen-ion concentration
Category: Chemical Engineering Mcqs
The large energy released in atomic bomb explosion is due to
A.release of neutrons
B.conversion of heavy atoms to lighter atoms
C.appreciable mass loss
D.higher mass of products than initial substance
The partial pressure distribution of both components of a non-reacting binary mixture of ideal gases is linear
A.in the case of steady-state equimolal counter-diffusion
B.in the case of steady-state unimolal unidirectional diffusion
C.both in the case of steady-state equimolal counter-diffusion and steady-state unimolal unidirectional diffusion
Two rods one of copper and the other of mild steel, both of diameter 20 mm and length 250 mm are coated with a uniform layer of wax all around. These rods are placed vertically in a boiling water bath with 200 mm, length of each rod projecting outside. If the melting point of wax is 10?C, then
A.equal quantity of wax will meet on the two rods
B.more wax will melt on copper rod as compared to mild steel rod
C.more wax will melt on mild steel rod as compared to copper rod
D.nothing can be predioted as the data is insufficient
Tributyl phosphate is used
A.in extraction of uranium plutonium and thorium nitrates
B.as fertilizer
C.as plasticizer
D.as an additive and antiknock supplement compound for petrol
Thermal conductivity of air at room temperature is approximately
A.0.002 kcal/m-hr-?C
B.0.02 kcal/m-hr-?C
C.0.2 kcal/m-hr-?C
D.2.0 kcal/m-hr-?C
E.20.0 kcal/m-hr-?C
The chemical formula of gypsum is
A.CaSO4
B.CaSO4.H2O
C.CaSO4.2H2O
D.CaSO4.
The per cent difference between lower heating value and higher heating value is maximum in the case of
A.hydrogen
B.LPG
C.Natural gas
D.carbon
A vapour containing liquid particles to the extent of 50% by the volume is known as
A.Saturated liquid
B.Super saturated liwuid
C.Wet vapour
D.Saturate vapour
E.Superheated vapour
