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JEE Main 201910 JanuaryEvening Shift
Exam
JEE Main
Year
2019
Date
10 January
Shift
Evening Shift
Subject
Chemistry
Chapter
Surface Chemistry

JEE Main 2019 · 10 January · Evening Shift · Chemistry · Surface Chemistry

The haemoglobin and the gold sol are examples of

The haemoglobin and the gold sol are examples of

Options

  1. Apositively charged sols,
  2. Bnegatively and positively charged sols, respectively.
  3. Cnegatively charged sols.
  4. Dpositively and negatively charged sols, respectively.

Correct answer

D. positively and negatively charged sols, respectively.

Step-by-step solution

Hemoglobin and gold sol both are colloids and always carry an electric charge. Hemoglobin is a positively charged sol, because in hemoglobin, Fe+2{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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