Armatics are desirable in
A.kerosine to improve smoke point
B.high speed diesel oil to improve centane number
C.gasoline to improve octane number
D.none of the above
Category: Chemical Engineering Mcqs
The normal boiling points of benzene and toluene are 80.1?C and 110.6?C respectively. A mixture containing 50 mole per cent benzene and 50 mole per cent toluene will boil at 1 atm at
A.80.1?C
B.110.6?C
C.a temperature in between 80.1?C and 110.6?C
D.a temperature of more than 110.6?C.
An exothermic reaction is that in which the reacting substances
A.have more energy than the products
B.have less energy than the products
C.have as much energy as the products
D.are at a higher temperature than the products
The nominal and effective interest rates are equal when the interest is compounded
A.monthly
B.continuously
C.semi-annually
D.annually
The gross heat of combustion is
A.the heat directly released by combustion
B.the heat released by cooling down all combustion products to the temperature before combustion
C.the latent heat of condensation of the water formed
D.all of these answers
During the course of a chemical reaction, the rate of a reaction
A.increases as the reaction proceeds
B.decreases as the reaction proceeds
C.cannot be predicted
D.remains constant throughout the reaction.
In case of liquids and gases, the heat transfer takes place according to
A.radiation
B.conduction
C.convection
D.Both (A) and (C)
Glass industry requires soda ash with
A.solids density 1.91 and bulk density 1.0
B.solids density 1.86 and bulk density 0.6
C.solids density 1.80 and bulk desity 0.58
D.none of the above
Which of the following statements in incorrect?
A.A rise in temperature usually tends to reduce the reaction rate
B.A rise in temperature usually increases reaction rates
C.A rise in temperature does not affect photo-chemical reaction rates
D.A rise in temperature has no effect on catalysed reaction.
Dynamic similarity refers to the similarity of
A.masses and forces
B.velocity and acceleration
C.physical dimensions
D.temperature and heat flux
