Tag: surface and interfacial phenomena

Surface and interfacial phenomenon: Electrical properties of interfaces and MCQs for GPAT, NIPER, Pharmacist and Drug Inspector exam

ELECTRICAL PROPERTIES OF INTERFACES: The existence of difference in electrical potential across a solid–liquid interface is demonstrated by the following phenomena: Electrophoresis: Movement of dispersed particles through a liquid medium under the influence of an electric field. Electro-osmosis: Movement of […]

Continue Reading

Surface and interfacial phenomenon: Solubilization and detergency and MCQs for GPAT, NIPER, Pharmacist and Drug Inspector exam

SOLUBILIZATION: It can be defined as the preparation of a thermodynamically stable isotropic solution of a substance normally insoluble or very slightly soluble in a given solvent by the addition of component or by any suitable methods. SOLUBILITY: The maximum […]

Continue Reading

Hydrophilic–Lipophilic Balance Concept, HLB classification and MCQs for GPAT, NIPER, Pharmacist and Drug Inspector exam

Hydrophilic–Lipophilic Balance Concept: The HLB concept was introduced by Griffin in 1947 to classify nonionic surfactants but has since been applied to ionic surfactants as well. In this system, each surfactant is assigned a number between 1 and 20, representing […]

Continue Reading

Surfactants, Surface active agents and Question Answer for GPAT, NIPER, Pharmacist and Drug Inspector exam

SURFACE-ACTIVE AGENTS (SURFACTANTS): Substances having both hydrophilic and hydrophobic regions in their molecular structures are called surfactants or surface-active agents. When surfactants are added to the air/ liquid (water) interface, they accumulate at the interface, a process that is generally […]

Continue Reading

Physical and chemical adsorption, Adsorption Isotherm, Adsorption phenomenon(Part1) and MCQs for GPAT, NIPER, Pharmacist and Drug Inspector exam

ADSORPTION PHENOMENA: Adsorption is the process in which materials of one phase (adsorbate) accumulate or concentrate at the interfacial surface of the other phase (adsorbent). It is a spontaneous phenomenon driven by a reduction of the surface free energy. Adsorption […]

Continue Reading

Measurement of Surface and Interfacial tension, Ring Detachment Method (du Nouy tensiometer) and Wilhelmy Plate Method and MCQs for GPAT, NIPER, Pharmacist and Drug Inspector exam

Ring Detachment Method (du Nouy tensiometer): The du Nouy’s ring method is similar to the Wilhelmy plate method, but it uses a ring or loop of wire. A platinum or Iridium wire of ~4 cm in circumference is suspended from […]

Continue Reading
×
Free Video Lectures of Pharmacy Exams
Apply now

Developed By Connect Globes