When a radioactive element emits a ?-particle it becomes
A.electrically positive
B.electrically negative
C.neutral
D.none of the above
Category: Chemical Engineering Mcqs
The range of nuclear forces is
A.10-8 cm
B.10-13 cm
C.10-16 cm
D.100 angstron
The principal constituent of Pyrex glass is
A.Zn
B.B
C.Pb
D.Ce
Acetylene is manufactured by
A.reacting calcium carbide with liquid water
B.Sachsse process
C.Wulff process
D.all of these ansers
Which of the following does not influence the rate of a reaction?
A.Temperature
B.Concentration of reactants
C.Catalyst
D.Number of molecules of reactants taking part in a reaction.
Which of the following is a sulphur compound?
A.Ethyl mercaptan
B.Pyridine
C.Naphthenic acid
D.Cumene
Monazite sand is a chief source of
A.uranium
B.thorium
C.radium
D.polonium
The chemical formula of diammonium phosphate is
A.(NH4)2HPO4
B.(NH4)2H2PO4
C.NH4H2PO4
D.(NH4)2PO4
The Schmidt number (NSc) is the ratio of
A.the momentum diffusivity to the mass diffusivity
B.the mass diffusivity to the momentum diffusivity
C.the thermal diffusivity to the mass diffusivity
D.the momentum diffusivity to the thermal diffusivity
Cork is a good insulator because
A.Its density is low
B.It is porous
C.It can be powdered
D.It can be cast into rolls
E.It is flexible
