Emulsions are normally prepared by shaking the two components together vigorously although some kind of emulsifying agent usually has to added to stabilize the product. This emulsifying agent may be a soap or other surfactant (surface active) species or a lyophilic sol. Emulsions are broadly classified into two types : (i) Oil in water emulsions (O/W): Oil acts as dispersed phase and water acts as dispersion medium (ii) Water in oil emulsions (W/O) : Water acts as dispersed phase and oil acts as dispersion medium. Dye test, dilution test may be employed for identification of emulsions. Select correct statement :
In the use of Cl_2 as bleaching agent, the substance that is mainly responsible for the bleaching is
Identify the oxidising agent, reducing agent, substance oxidised and substance reduced in the following reactions. MnO_2 + 4HCl to MnCl_2 + Cl_2 + 2H_2O
Soap emulsifies
Soap emulsifies
Following type of non-ionic detergents are present in liquid detergents,emulsifying agents and wetting agents.Label the hydrophilic and hydrophobic parts in the molecule Identify the functional group(s) present in the molecule.
The equivalent weights of oxidising and reducing agents can be calculated by the number of electrons gained or lost. The equivalent weight of an oxidising agent is the number of parts by weight of the substance which gains one electron. Thus, it is equal to the molecular weight of the substance divided by the number of electrons gained in the balanced chemical equation. Similarly, equivalent weight of a reducing agent is equal to the molecular weight divided by the number of electrons lost as represented in the balanced chemical equation Equivalent weight of MnO_(4)^(-) in acidic, basic and neutral media are in the ratio of
NARENDRA AWASTHI-SURFACE CHEMISTRY-Level 3 - Assertion - Reason Type Questions
