Solve your IGNOU Doubts

Question:

What is distribution ratio? Discuss the distribution of benzoic acid between benzene and water.

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Question:

Discuss how various separation methods can be classified on the basis of equilibrium processes.

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Question:

Briefly explain different forms of distillation.

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Question:

Briefly discuss the principle of the working of a flame photometer. Which are the other atomizers that have been proposed beside the flame and spectrographs for atomization.

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Question:

What are the advantages and disadvantages of using organic precipitants?

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Question:

Give the differences between coprecipitation and postprecipitation?

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Question:

How does the absorption indicators work for the Fajan’s method of precipitation titration.

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Question:

What are the criteria for solvent selection during redox titrations in nonaqueous solvents.

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Question:

What is the role of solvents in acid base reactions?

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Question:

What is the modern quinoid theory. Give the structures of and the colour changes of methyl orange and phenolphthalein based on this theory.

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Question:

With a suitable example illustrate the titration of a weak base versus strong acid.

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Question:

What is meant by buffer capacity of a solution.

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Question:

Calculate the $\left [ OH^{-} \right ]$ of $0.2\, M\, Na_{2}CO_{3}.\: \left ( K_{W}=1.0\times 10^{-14};K_{1}=6.20\times 10^{-7}and\, K=2.8\times 10^{-11}for\, H_{2}CO_{3} \right ).$ CO3. (Kw = 1.0 × 10-14; K1 = 6.20 × 10-7 and K2 = 2.8 × 10-11 for H2CO3).

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Question:

Urea of concentration 0.25 mM was hydrolysed using urease of concentration of 10.0 micro mol. Using the values $k^2 = 6 \times 10^4 s^{-1}$ and Michaelis constant for urease 2.0mM calculate the initial rate of the reaction.