Main pollutant present in automobile exhaust is________?

Percentage of glycerine present in the spent lye obtained during soap manufacture is about________?

Effectiveness of a fertilizer is independent of the ________?

Hollander beater used during paper pulp manufacture does not facilitate the ________ of fiber?

In a/an ________, the flow rate of fluids is obtained by measuring the difference between the impact and the static pressure?

The ratio of momentum diffusivity to thermal diffusivity is the ________ number?