1.

Match List-I with List-IIList-IList-II(A) Lyophilic colloid(I) Liquid-liquid colloi(B) Emulsion(II) protective colloid(C) Positively charged(III) FeCl3 + NaOH(D) Negatively charged colloid(IV) FeCl3 + hot waterChoose 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»

(A) (A) – (II), (B) – (I), (C) – (IV), (D) – (III)

(A) Protective colloids are lyophilic colloids 

(B) Emulsions are liquid in liquid colloidal solutions 

(C) FeCl3 + hot water forms positively charged colloidal solution of hydrated ferric oxide. 

(D) FeCl3 + NaOH forms negatively charged colloidal solution due to preferential adsorption of OH- ions



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