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Question: Answered & Verified by Expert
The haemoglobin and the gold sol are examples of
ChemistrySurface ChemistryJEE MainJEE Main 2019 (10 Jan Shift 2)
Options:
  • A positively charged sols,
  • B negatively and positively charged sols, respectively.
  • C negatively charged sols.
  • D positively and negatively charged sols, respectively.
Solution:
1647 Upvotes Verified Answer
The correct answer is: positively and negatively charged sols, respectively.

Hemoglobin and gold sol both are colloids and always carry an electric charge. Hemoglobin is a positively charged sol, because in hemoglobin, Fe+2 ion is the central metal ion of the octahedral complex. All metal sols like, Au-sol, Ag-sol etc. are negatively charged sols

The gold sol is negatively charged, while the haemoglobin is positively charged.

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