Given below are two statements. In the light of the above statements, choose the most appropriate answer from the options given below.
Statement I:Nano-scale metallic and bimetallic particles can efficiently remove common water pollutants such as PCBs, organochlorine pesticides and halogenated organic solvents.
Statement II:Nano-scale metallic and bimetallic particles cannot reduce heavy metals such as nickel, arsenic and mercury.
ABoth Statement I and Statement II are correct
BBoth Statement I and Statement II are incorrect
CStatement I is correct but Statement II is incorrect ✓ Correct
DStatement I is incorrect but Statement II is correct
Correct answer: (C) Statement I is correct but Statement II is incorrect
Explanation
Statement 1 is correct, as nano-scale metallic and bimetallic particles efficiently remove PCBs, organochlorine pesticides and halogenated solvents.
Their large surface area makes them highly reactive water-treatment agents.
Statement 2 is wrong, because such nanoparticles can also reduce heavy metals like nickel, arsenic and mercury.
They transform these metals into less mobile or less toxic forms.
The claim that they cannot treat heavy metals misstates their capability.
Nano zero-valent iron is a widely studied particle for water remediation.
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