The units of specific conductance are_____________________?
A.ohm/cm
B.mho/cm
C.ohm-cm
D.mho-cm
Category: Chemical Engineering Mcqs
If [OH-] = 10-6 moles/litre its pH is___________________?
A.6
B.8
C.12
D.3
Conductivity meter works on the principle of ______________________?
A.change of angle of refraction with composition
B.polarisation of light
C.change of electrical conductivity of solution with composition
D.change of electrical resistance with temperature.
The diathermous body is one that ______________?
A. diffuses all the thermal rays in the different directions
B. absorbs all the thermal rays
C. negligible absorptivity but high reflectivity
D.Allows all the incident radiation to pass through it
Continue reading “The diathermous body is one that ______________?”
Sodium plumbite has the chemical formula____________?
A.NaPbO2
B.Na2PbO
C.Na2PbO2
D.Na4PbO
Continue reading “Sodium plumbite has the chemical formula____________?”
Which one of the following properties of thermocouples for industrial use is undersirable?
A.Relative large thermal e.m.f.
B.Resistance to corrosion and oxidation
C.Non-linear relation of e.m.f. to temperature
D.Precision of calibration
Radiation pyrometer works on the principle of___________?
A.Stefan-Boltzmann law
B.Ohms law
C.Seebeck effect
D.Curies law
Resistance thermometers work on the principle of______________?
A.increase of electrical resistance with increase in temperature
B.increase in vapour pressure with increase in temperature
C.linear expansion of metal with increase in temperature
D.e.m.f. generated in a single homogeneous wire with increase in temperature
The resistance of platinum______________?
A.increases with increase in temperature
B.decreases with increase in temperature
C.remains constant with change in temperature
D.decreases linearly with increase in temperature
Refractometer works on the principle of________________?
A.polarisation of light
B.change of angle of refraction with composition
C.change of the electrical donductivity of solution with composition
D.change of the electrical conductivity of solution with temperature
