________ mills fall in the category of tumbling mills?

At high Reynolds number________?

“The rate at which a substance reacts is proportional to its active mass and the rate of a chemical reaction is proportional to the product of active masses of the reacting substances”. This is the________?

Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like________?

Baking soda is chemically represented by________?

Generally, elliptical dished heads________?