Reheating furnace (pusher type) is used for heating________?

In reactions involving solids and liquids (where change in volume is negligible), the heat of reaction at constant pressure as compared to that at constant volume is________?

The term Biological Oxygen Demand (BOD) is used in relation to ________?

The main use of heavy gas oil produced by the vacuum distillation unit is as a________?

Coal containing large quantity of ________ are difficult to wash?

Karbate is________?