Question

Blood is a colloidal solution of a __(i)__ substance. The styptic action of ___(ii)___ and __(iii)___ solution is due to __(iv)___ of blood forming a clot which stops further bleeding.

• A. (i) albumoid (ii) aluminium (iii) ferrous chloride (iv) peptization
• B. (i) albumoid (ii) alum (iii) ferric chloride (iv) coagulation
• C. (i) electrolytic(ii) alum(iii) ferrous chloride (iv) circulation
• D. (i) negatively charged (ii) chrome alum (iii) sodium chloride (iv) coagulation

Answer 1

The correct option is B (i) albumoid (ii) alum (iii) ferric chloride (iv) coagulation

• The process of settling of colloidal particles is called coagulation or precipitation of the sol.
  
• The minimum concentration of an electrolyte in millimoles per litre required to cause precipitation of a sol in two hours is called coagulating value.
  
• Blood is a colloidal solution of an albuminoid substance. The styptic action of alum and ferric chloride solution is due to coagulation of blood forming a clot which stops further bleeding.
  

So, option $B$ fills up the correct answers.