Which is almost absent in crude petroleum?

Molten soap mass is transported by a ________ pump?

Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used________?

Referring to the periodic table of elements, it is found that with increasing atomic number. The atomic size in the same________?

A material is called ‘ductile’, if it can be________?

At a given value of E/R (ratio of activation energy and gas constant), the ratio of the rate constants at 500°K and 400°K is 2, if Arrhenius law is used. What will be this ratio, if transition state theory is used with the same value of „E/R‟?