Question

Match List-I with List-II

List-I		List-II
A	Lyophilic colloid	I	Liquid-liquid colloid
B	Emulsion	II	protective colloid
C	Positively charged	III	$FeCl_3 + NaOH $
D	Negatively charged colloid	IV	$FeCl_3 +$ hot water

Choose the correct answer from the options given below:

• A. (A) - (II), (B) - (I), (C) - (IV), (D) - (III)
• B. (A) - (III), (B) - (I), (C) - (IV), (D) - (II)
• C. (A) - (II), (B) - (I), (C) - (III), (D) - (IV)
• D. (A) - (III), (B) - (II), (C) - (I), (D) - (IV)

Answer 1

Answer: (A)

(A) Protective colloids are lyophilic colloids
(B) Emulsions are liquid in liquid colloidal solutions
(C) $FeCl _{3}+$ hot water forms positively charged colloidal solution of hydrated ferric oxide.
(D) $FeCl _{3}+ NaOH$ forms negatively charged colloidal solution due to preferential adsorption of $OH ^{-}$ions