Unit operation involved in the prilling of urea is________?

Cold crushing strength of refractories depends upon its________?

Working principle of bimetallic thermometers is difference in linear co-efficient of thermal expansion of two strips of different metals welded together. Which of the following has the maximum thermal co-efficient of linear expansion?

Melting of ice is an example of an ________ process?

Drag is defined as the force exerted by the________?

Pure oxygen is mixed with air to produce an enriched air containing 50 volume % of oxygen. The ratio of moles of air to oxygen used is________?