Chemistry - Surface Chemistry Question with Solution | TestHub
Match the list :
List - I | List - II |
|---|---|
(P) These are obtained from organic material such as starch, gum, etc. | (1) Emulsifying agent |
(Q) Dispersed phase has little affinity for the dispersion medium | (2) Electrophoresis |
(R) sol is attracted towards the negative plate when an electric field is applied | (3) Lyophobic sol |
(S) The protein casein in milk stabilised the butter | (4) Lyophilic sol |
Options:
Answer:
Solution:
P: Lyophilic sols are obtained from organic materials like starch, gum. (P-4)
Q: Lyophobic sols have little affinity between dispersed phase and dispersion medium. (Q-3)
R: Electrophoresis is the movement of colloidal particles under an electric field. Fe(OH)₃ sol is positively charged, so it moves to the negative plate. (R-2)
S: Emulsifying agents stabilize emulsions. Casein stabilizes butter (an emulsion). (S-1)
Therefore, the correct match is P-4, Q-3, R-2, S-1.