Solve your IGNOU Doubts
Solve your IGNOU Doubts
Question:

Enlist any five characteristics of ideal support material for liquid-liquid partition chromatography.

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Question:

Draw van Deemter plot. What conclusions can be drawn on the basis of reducing zone broadening?

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Question:

Brief explain the concept of theoretical plates.

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Question:

Discuss the role of masking agents in solvent extraction.

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Question:

With the help of suitable examples, describe the extraction of anionic metal complexes by high molecular weight amines.

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Question:

Describe salient features of extractions using crown ethers.

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Question:

Explain percentage extraction. Derive the expression for it.

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Question:

Discuss various criteria used for the selection of separation methods.

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Question:

Briefly explain the separation methods based on surface activity.

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Question:

What is inductively coupled plasma (ICP)? What are the two types of ICP instruments? Can you determine all elements by ICP?

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Question:

Briefly describe the role of computers in analytical instrumentation.

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Question:

Explain supersaturation and nucleation in context with gravimetric analysis.

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Question:

Give the curve for precipitation titration of Br' with Ag+. Explain it.

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Question:

Lead-EDTA chelate having the formula PbY2- has a formation constant of 1.1X1014. Compute the conditional formation constants at a pH = 10. (value of ay4- at pH of 10 is 0.36).

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Question:

What are the key steps in designing a typical complexometric determination? How are they advantageous over precipitation titrations?

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Question:

What are the factors that affect stability of metal-ligand complexes? Elaborate on any two of them.

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Question:

Calculate the redox potential of Sn4+, Sn2+ system, if the Sn4+ ion concentration is 1 g ion/dm3 and the Sa2+ ion concentration is 0.001 g ion/dm3.

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Question:

Calculate the pH of a solution prepared by adding 25 cm³ of 0.20 M NaOH to 30 cm³ of 0.40 M acetic acid.

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Question:

What is indicator error? How the indicator should be selected for a given titration?

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Question:

Write the chemical equations for the leveling of HCIO4, HCI and HNO3 in methanol. Also give the steps in which phosphoric acid dissociates.

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