HF alkylation units operate at
A.4?C
B.180?C
C.480?C
D.37?C
A.4?C
B.180?C
C.480?C
D.37?C
A.U-tube type mercury manometer
B.Bimetallic thermometer with covering
C.Vapour pressure thermometer without any covering
D.mercury thermometer with covering.
A.P
B.P2
C.P3
D.P4
A.one
B.zero
C.infinity
D.none of the above
A.200 to 220?C
B.120 to 130?C
C.40 to 50?C
D.250 to 275?C
A.20 years
B.30 years
C.40 years
D.125 years
A.first power
B.second power
C.third power
D.fourth power.
A.1.8 to 9.5 %
B.4.1 to74.2 %
C.3.2 to 12.5 %
D.1.6 to 8.5 %
A.can use low-grade brine
B.requires less electric power than the modified Solvay process
C.does not require NH3 plant investment
D.all of the above
A.Pressure of a gas kept at constant-volume
B.Volume of a gas kept at constant-pressure
C.Thermal emf of a thermocouple
D.All of the above