More from Dr Amrut Gaddamwar

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Part Ill (Sem vg a, = Sem vi |, , , , 28, . . 2, , 19. What is aie mixture of quinine and hydroquinone., , a What are different types of potentiometric titrations?, , As a) Acid-base b) Redox c) Precipitation and d) Complex ometrig, titrations. ©, , 21. What is an indicator electrode?, , Ans. Anelectrode is one whose potential changes as a result of change, in concentration of ions with which it is reversible., , 22. What is meant by standard solution?, , Ans. Asolution whose concentration is exactly known., , 23. Whatis primary standard solution?, , Ans. A solution which is used as a reference to determine the , concentration of other solutions., 24. What are the criterion for a substance to be used as a primary, , standard substance ?, , Ans. Thesubstance should be available in pure state, readily soluble in, water, non hygroscopic and should be stable on storage. {, , 25. Can NaOH be used as primary standard substance?, , Ans. No, it can not be used since it is hygroscopic., , 26. Acetic acid is a weak acid?, , Ans. — Because it ionizes slightly in aqueous solution., , 27. Define plane polarized light?, , Ans. Light which vibrates only in one plane is called plane polarized, light., , 28. What are the factors that affect angle of rotation?, , Ans, a) nature of substance, b) nature of solvent c) wavelength, 4), , temperature e) thickness of liquid column., 29. What is the nature of optical activity?, Ans. It is constitutive Property., , 30. Which compounds are optically active?, Ans. The organic compounds having at least one asymmetric carbon, atom., Re Ke, , vvaiicu wir Cal