Common coagulants (salts) used in conventional water treatment include the following alum (aluminum sulfate), sodium aluminate, ferric sulfate, ferrous sulfate, ferric chloride, and polymers. Question 1 options: True False

True

Explanation:

This is the true statement .

Because There are two types of metal coagulants used : aluminium and iron.

The aluminum coagulants include aluminum sulfate, aluminum chloride and sodium aluminate.

The iron coagulants include ferric sulfate, ferrous sulfate, ferric chloride and ferric chloride sulfate.

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.