Most easily and cheaply available fibrous raw material for paper manufacture available in India is bamboo. The yield of pulp produced from fibrous raw material by mechanical process is about ________ percent?

Periclase refractory contains mainly________?

In practical operation of any furnace, zero oxygen percentage or theoretical CO2 percentage in flue gas is rarely achieved, because of________?

Out of the following processes of paper pulp manufacture, the maximum corrosion problem in digestion & handling equipments is encountered in the ________ process?

‘Fat coals’ are those coals which have very high________?

Neutrons have mass approximately equal to that of ________ atoms?