In iodine-sodium redox titration, the color of indicator changes from to at the
ID: 1074092 • Letter: I
Question
In iodine-sodium redox titration, the color of indicator changes from to at the end point. phenolphthalein, colorless to pink Starch, pick to colorless phenolphthalein, brown to colorless Starch, brown to colorless Starch, colorless to brown The is the ratio of concentration of hydrophobic compound in a mixture of two immiscible liquids, and is dissociation constant, -1 partition coefficient, 1 mole fraction, 1 The electrochemical reaction in electrolytic cell is with delta F spontaneous, > 0 spontaneous 0 nonspontaneous,Explanation / Answer
1) In Iodine-sodium thiosulfate redox titration, the color of starch indicator changes from brown to colorless at the end point. (Option-D)
2) The partition coefficient is the ratio of concentration of hydrophobic compound in a mixture of two immisicible liquids, and is greater than 1 (option-C)
3) The eletrochemical reaction in an electrolytic cell is non-spontaneous with del G >0 (positive) (Option -C)
4)The cell potential is dependent on the concentration via Nernst equation (Option-C)
5)The transition from crystalline to liquid is called melting (Option -B)
6)All of the following processes would result in mass loss of componds except formation of non-volatile compounds (Option-D)
7)The thermal decomposition of compounds can be studied by monitoring the mass loss with temperature in thermogravimetric analysis (option-d)
8) The crystallisation of a polymer is exothermic (option-B)
9)Sodium dodecyl sulfate is zwitterionic surfactant.(option-A)
10)The surface tension of water decreases as the temperature increses
Note for 10th question Options are fullly visible( option D hidden)