Q41 / 48 · NTA Abhyas (JEE Main) 2020 · Chemistry · Surface Chemistry

Bleeding is stopped by the application of ferric chloride. This is because:

  • A
    The blood starts flowing in opposite direction
  • B
    The blood reacts and forms a solid, which seals the blood vessel
  • Correct answer
    C
    The blood is coagulated and thus the blood vessel is sealed
  • D
    The ferric chloride seals the blood vessel

Solution

Blood is a colloidal solution and FeCl 3 is a strong coagulant. Blood contains colloidal impurities and FeCl 3 neutralizes the charge on these colloidal impurities and clotting of blood begins which blocks the vessels and prevents any further flow of blood.

Hence, the correct answer is option: 'C'.

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