Q. The finely divided dispersion of solid particles which are not visible to the naked eye and cannot be removed by ordinary filters are known as ?

  • (A) suspended impurities
  • (B) dissolved impurities
  • (C) colloidal impurities
  • (D) none of these
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✅ Correct Answer: (C) colloidal impurities

Published by Sandhya Thakur ⭐ 4.08K Points at 23-Feb-2025 04:22 pm in Public Health Engineering

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