Thermal diffusivity is least for
A.Rubber
B.Lead
C.Aluminium
D.Iron
E.Mercury
Category: Chemical Engineering Mcqs
For v = 3 St and p = 0.80 g/cm3 in N.s/m2 is
A.0.375
B.3.75
C.0.24
D.2.4
Heavy water used in nuclear reactors is
A.a product of oxygen and deuterium
B.an ordinary water containing dissolved salts of heavy metals
C.water of mineral springs
D.water produced by repeated distillation and condensation
The collection efficiency of electrostatic precipitator depends on
A.the electrode area
B.the particle drift velocity
C.the gas flow rate
D.all of the above
Calorific value of Indian coal is
A.2000 kcal/kg
B.3300 kcal/kg
C.5700 kcal/kg
D.9600 kcal/kg
White phosphorus is most stable
A.at ordinary temperature
B.at atmospheric pressure
C.above 600?C
D.under high pressure
The quantity of heat required to change the temperature of 1 gm of ice from -6?C to -5?C is known as
A.Latent heat of freezing
B.Specific heat
C.Heat of vaporization
D.Cold heat
E.Freezing heat
In bronze copper is alloyed with
A.Zn
B.Sn
C.Be
D.AI
When a radioactive element emits a ?-particle it becomes
A.electrically positive
B.electrically negative
C.neutral
D.none of the above
