Correct answer
B. None of these
Explanation
The correct answer is None of these.
Chalcopyrite is the main ore of________?
In case of design of a shell and tube heat exchanger________?
Weber number is significant and is concerned with the________?
Use of catalyst is a must in the ammonia manufacture, because the reaction is reversible as well as the heat of dissociation of N2 & H2 is high. The presence of promoter along with the catalyst helps in ________ of the catalyst?
Pick out the wrong statement/
Which of the following liquid-vapor contacting devices provides maximum contact surface area for a particular duty?