Question:
Identify the metal nanoparticle that acts as a highly effective bacterial disinfectant in the water purification process.
Identify the metal nanoparticle that acts as a highly effective bacterial disinfectant in the water purification process.
Show Hint
Silver nanoparticles are strongly antibacterial and are used in water filters.
Updated On: Nov 12, 2026
- carbon black
- silver
- aluminium
- copper
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Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept
Some metal nanoparticles damage bacterial cells even at very small doses.
Step 2: Silver
Silver nanoparticles release \(\text{Ag}^{+}\) ions and produce reactive oxygen species. These damage bacterial membranes, enzymes and DNA.
Step 3: Compare options
Carbon black is not a metal. Aluminium and copper nanoparticles are not the standard disinfectant in water purifiers.
Final Answer:
Silver is the metal nanoparticle used for disinfection. \[ \boxed{\text{(B) }\text{silver}} \]
Some metal nanoparticles damage bacterial cells even at very small doses.
Step 2: Silver
Silver nanoparticles release \(\text{Ag}^{+}\) ions and produce reactive oxygen species. These damage bacterial membranes, enzymes and DNA.
Step 3: Compare options
Carbon black is not a metal. Aluminium and copper nanoparticles are not the standard disinfectant in water purifiers.
Final Answer:
Silver is the metal nanoparticle used for disinfection. \[ \boxed{\text{(B) }\text{silver}} \]
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