Given below are two statements. In the light of the above statements, choose the correct answer from the options given below.
Statement I:Ion exchange is an example of a tertiary wastewater treatment process.
Statement II:Ion exchange is used for the removal of residual suspended solids.
ABoth Statement I and Statement II are true
BBoth Statement I and Statement II are false
CStatement I is true but Statement II is false ✓ Correct
DStatement I is false but Statement II is true
Correct answer: (C) Statement I is true but Statement II is false
Explanation
Statement 1 is correct, as ion exchange is a tertiary wastewater treatment process.
It swaps unwanted dissolved ions in water for harmless ions held on a resin.
Statement 2 is wrong, because ion exchange removes dissolved ions, not residual suspended solids.
Suspended solids are taken out earlier by settling and filtration steps.
Ion exchange typically targets hardness, nitrates and heavy-metal ions.
It is widely used to soften and demineralise water.
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