The viscosity of the hydrocarbon liquids
A.remains unaffected with change in density
B.decreases with increase in density
C.increases with increase in density
D.none of the above
Category: Chemical Engineering Mcqs
The potassium hydroxide solution absorbs
A.CO2 as well as CO
B.CO2 as well as O2
C.CO2 O2 and CO
D.CO2 as well as SO2
Hydrogen cannot be liquefied at room temperature because
A.it has low density
B.it has high specific heat
C.it is a diatomic gas
D.its critical temperature is less than the room temperature
With in the range of _______ of oxygen in the flue gas the combustion has enough excess air to minimize incomplete combustion and not to much excess air to cause excessive dry-gas or stack loss
A.15 to 20%
B.2.5 to 3.5%
C.15 to 30%
D.10 to 30%
The average value of thermal conductivity for water at 20?C is about
A.0.13
B.0.32
C.0.51
D.None of the above
Which of the following properties of elements is a whole number?
A.Atomic weight
B.Atomic radius
C.Atomic volume
D.Atomic number
Sulphur content in heavier products is determined generally by
A.lamp method
B.quartz tube method
C.bomb method
D.none of the above
In alkylation processes olefins react with
A.normal paraffins
B.isoparaffins
C.naphthenes
D.aromatics
What is the explosive range for hydrogen
A.4.1 to 74.2 %
B.5.3 to 14.0 %
C.3.2 to 12.5 %
D.2.1 to 9.4 %
Hydrogen peroxide is concentrated by
A.distillation at atmospheric pressure
B.crystallization
C.dehydration
D.vacuum distillation
