In sweetening process, solutizer agent used with caustic alkali is________?

If the internal energy of an ideal gas decreases by the same amount as the work done by the system, then the________?

Which one of the following is not an elastomer?

Gases diffuse faster compared to liquids because of the reason that the liquid molecules________?

A proportional controller with a gain of Kc is used to control a first order process. The offset will increase, if________?

Which of the following is a periodic furnace?