Activators are those chemicals which help buoying up one mineral in preference to the other in the froth floatation process. Which of the following is an activator?

Polycaprolactam is________?

The hottest part of the flame lies in its ________ zone?

Which of the following processes can remove both temporary as well as permanent hardness of water?

LMTD correction factor which is to be applied for a cross-flow heat exchanger increases with increase in the number of shell passes. Its value for a single pass cross flow heat exchanger is ________?

Milk is dried usually in a ________ dryer?