An azeotropic mixture of two liquids has boiling point higher than either of them when it
A.is saturated
B.shows negative deviation from Raoults law
C.shows positive deviation from Raoults law
D.shows no deviation from Raoults law
Category: Chemical Engineering Mcqs
A block of wood and a block of metal feel equally cold or equally hot when touched. Then their common temperature is
A.0?K
B.0?F
C.0?C
D.the same as that of the human body
Spherical shape of droplets of mercury is due to its
A.high adhesion
B.low vapour pressure
C.high surface tension
D.high density
A certain first-order reaction is half completed in 23 minutes. The rate constant for the reaction must be
A.0.030 s-1
B.0.030 min-1
C.0.030 hr-1
D.0.10 min-1
The half-life period of a radioactive element depends on
A.pressure
B.temperature
C.amount of element present
D.none of these
Potassic fertilizer is required
A.for the development of the starches of potatoes and grains
B.for the development of the sugar of fruits and vegetables
C.for the development of the fibrous material of plants
D.all of these answers
A dimensionless number which is the ratio of kinematic viscosity to thermal diffusivity is known as
A.Prandtl number
B.Reynolds number
C.Nusselt number
D.Pacelet number
E.Grashoff number
The equilibrium yield of sulphur trioxide obtained from the oxidation of sulphur dioxide can be increased by
A.square root of system pressure at a given temperature
B.cube root of system pressure at a given temperature
C.square of system pressure at a given temperature
D.cube of system pressure at a given temperature
The value of the wavelength for maximum emissive power is given by
A.Planck’s law
B.D’Alembert’s rule
C.Kirchhoff’s law
D.Stefan law
E.Wein’s law
In slowing down neutrons in a reactor protons are most effective because
A.the mass of a proton is almost equal to that of a neutron
B.the proton has a change+e
C.the proton is a constituent of all nuclei
D.none of the above
