Tag: surface and interfacial phenomena mcq

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 […]

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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 […]

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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 […]

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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 […]

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Drop weight and drop count method and Spinning Drop Method and MCQs for GPAT, NIPER, Pharmacist and Drug Inspector exam

Drop Weight and Drop Count Method: Principle: If a liquid is allowed to fall slowly through a capillary tube, the liquid first forms a drop at the tip of the capillary tube, which gradually increases in size and finally detaches […]

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