NEETChemistrySurface Chemistry
Match List-I with List-II List-I List-II (A) negatively charged sol (I) Fe 2 O 3 · xH 2 O (B) macromolecular colloid (II) CdS sol (C) positively charged sol (III) Starch (D) Cheese (IV) a gel Choose the correct answer from the options given below
Options
- AA - II , B - III , C - IV , D - I
- BA - II , B - I , C - II , D - IV
- CA - II , B - III , C - I , D - IV
- DA - I , B - III , C - II , D - IV
Correct answer
C. A - II , B - III , C - I , D - IV
Step-by-step solution
Colloidal particles always carry an electric charge. The nature of this charge is the same on all the particles in a given colloidal solution and may be either positive or negative. Negatively charged sol ⇒ CdS Positively charged sol ⇒ Fe 2 O 3 . xH 2 O Macromolecular colloids are individual particles that are large enough to be considered colloids (diameter around 100 nm). These particles are made up of chemicals with a high molecular weight. Macromolecular colloid ⇒ Starch Gel ⇒ Cheese