Graphite is
A.an allotropic form of carbon
B.used as moderator in nuclear reactors
C.an electrical conductor
D.all of the above
Category: Chemical Engineering Mcqs
Ordinary mercury-in-glass thermometer works on the principle of
A.volumetric expansion of mercury with increase in temperature
B.increase of vapour pressure with increase in temperature
C.increase of electrical resistance with increase in temperature
D.decrease of vapour pressure with increase in temperature
Methane is flammable in concentrations from
A.4.1 to 74.2 %
B.5.3 to 14.0 %
C.3.2 to 12.5 %
D.1.6 to 8.5 %
The half-life period t 1/2 of a radioactive element is N years. The period of its complete decay is
A.2N years
B.N2 years
C.N2 years
D.infinity
Heat conduction does not occur
A.If a physical body is impermeable to any kind of rays
B.If the parts of a body are not in motion relative to one another
C.If the bodies are kept in vacuum
D.If the bodies are immersed in water
E.If the temperature difference between the bodies does not exist
Mercaptans
A.are low boiling oxygen compounds
B.are desirable in gasoline
C.decrease the octane number of gasoline
D.are not corrosive
Ordinary mercury-in-glass thermometers are used to measure the temperature in the range of
A.?30? to 350?C
B.?20? to 1600?C
C.60? to 600?C
D.0? to 600?C
Unit of radioactivity is
A.Curie
B.Fermi
C.Angstron
D.Candle
