question_answer 104)

          Match the items given in Column I and Column II.

	Column 1	Column 11
A. B. C. D.	Protective colloid Liquid-liquid colloid Positively charged colloid Negatively charged colloid	Lyophilic colloids Emulsion + hot water

         

Answer:

                                  A. ®(2)   B. ® (3)   C. ® (4)   D.® (1) A. Lyophobic colloid (solvent hating colloid) are readily protected by small amount of electrolyte. These colloids are also stabilised by addition of lyophilic colloids which makes a protective layer around lyophobic sol. Hence, lyophilic sol are known as protective colloid. B. Liquid-liquid colloid is also known as emulsion if they are partially miscible or immiscible liquids. C. When  is added to hot water it lead to the formation of positively charged colloid. D. When NaOH is added to  it lead to the formation of negatively charged colloid.