Co-current absorbers are usually used when the gas to be dissolved in the liquid is ___________________?

A. Always lower than
B. Always higher than
C. Same as
D. Dependent on the system; can be either lower or higher than

A. Sieve plate column
B. Bubble cap column
C. Randomly packed column
D. Wetted wall column

A. Molecular velocity only
B. Pore radius of the catalyst only
C. Molecular mean free path only
D. Molecular velocity and pore radius of the catalyst

A. Temperature is 100°C
B. Temperature is more than 100° C
C. Product must be immiscible with water
D. Temperature is higher than the boiling point of either component