Absolute viscosity expressed in poises is converted to the SI unit of viscosity by multiplication by
A.1
B.0.1
C.0.01
D.0.001
Category: Chemical Engineering Mcqs
The vapour pressure of liquid
A.remains unaffected with change in temperature
B.decreases with increase in temperature
C.increases with increase in temperature
D.increases linearly with increase in temperature.
HF alkylation units operate at
A.4?C
B.180?C
C.480?C
D.37?C
Which of the following is a first-order instrument?
A.U-tube type mercury manometer
B.Bimetallic thermometer with covering
C.Vapour pressure thermometer without any covering
D.mercury thermometer with covering.
The phosphorus vapours are composed of
A.P
B.P2
C.P3
D.P4
At the boiling point of the liquid at the prevailing pressure the saturated absolute humidity becomes
A.one
B.zero
C.infinity
D.none of the above
The temperature maintained in the electrical desalters is normally in the range of
A.200 to 220?C
B.120 to 130?C
C.40 to 50?C
D.250 to 275?C
The half-life period of a radioactive element is 10 years. How long it takes to reduce to 12.5% of its original weight?
A.20 years
B.30 years
C.40 years
D.125 years
Suppose doubling the concentration of a reactant increases the rate of reaction by a facator of 4, and tripling the concentration of the reactant increases the reaction rate by a factor of 9. Then the rate of reaction is proportional to the concentration of the reactant raised to the
A.first power
B.second power
C.third power
D.fourth power.
What is the explosive range for ethane?
A.1.8 to 9.5 %
B.4.1 to74.2 %
C.3.2 to 12.5 %
D.1.6 to 8.5 %
