Question

In zeolite process, only small amount of ________ ions can be removed.

(a) Mn^++

(b) Fe^++

(c) Both Fe^++ and Mn^++

(d) Neither Fe^++ nor Mn^++

The question was posed to me in a national level competition.

The origin of the question is Permutit’s Process topic in section Water of Applied Chemistry

Answer 1

The correct option is (c) Both Fe^++ and Mn^++

Best explanation: In zeolite process, only small amount of the Fe^++ and Mn^++  are removed. The total amount can be removed by using the lime soda process.