Working principle of mercury in glass thermometer is based on the ________ of mercury with increase in temperature?

Tolerable concentration of toxic carbon monoxide in atmospheric air is about ________ ppm?

‘Cox’ chart which is useful in the design of a distillation column (particularly suitable for petroleum hydrocarbons) is a plot of the________?

Crushing strength of a refractory________?

A first order reaction A → B occurs in an isothermal porous catalyst pellet of spherical shape. If the concentration of A at the centre of the pellet is much less than at the external surface, the process is limited by________?

Low temperature oxidation of coal during storage does not decrease its________?