Which of the following, do you think are the synthetic resins present in removal of permanent hardness?(a) cation exchange resins only(b) anion exchange resins only(c) both cation exchange resins and anion exchange resins(d) neither cation exchange resins nor anion exchange resinsThis question was addressed to me in an international level competition.This interesting question is from Hydrogen topic in section Hydrogen of Chemistry – Class 11

Which of the following, do you think are the synthetic resins present

1.	Which of the following, do you think are the synthetic resins present in removal of permanent hardness?(a) cation exchange resins only(b) anion exchange resins only(c) both cation exchange resins and anion exchange resins(d) neither cation exchange resins nor anion exchange resinsThis question was addressed to me in an international level competition.This interesting question is from Hydrogen topic in section Hydrogen of Chemistry – Class 11
Answer» The correct option is (c) both CATION exchange resins and ANION exchange resins Best EXPLANATION: There are two types of synthetic resins USED for removal of permanent hardness. They are cation exchange resins which are big molecules containing sulfonic acid group and an anion exchange resins which are also big molecules containing amino acids.

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