Evaporators used in caustic soda recovery and production plant are made of________?

Zirconia refractory________?

Consider a centrifugal pump having a specific impeller diameter, fixed impeller speed pumping a liquid of constant density at a particular discharge capacity. With decrease in the capacity of the pump, the ________ decreases?

TLV of aldrin in public water supply system is about ________ μg/litre?

Bleaching of paper pulp is done with________?

For the reversible exothermic reaction, N2 + 3H2 ⇌ 2NH3, increase of pressure would________?