Give the advantages of using continuous extraction?

 With the help of suitable equations explain the method solvent extraction with Diphenythiocarbazone.

 Give the mechanism of extraction by solvation.

With the help of suitable examples differentiate between the terms-distribution coefficient and distribution ratio.

Give the differences between t-test and F-test with the help of suitable examples.

A sample was analyzed for desired constituent having 3.67 g as the true value. The results of three measurements were 3.70 g, 3.74 g, and 3.77 g. Find the error of the mean (mean error), the percent relative error and the relative accuracy of the mean of the measurements.

Give the details of the preservation techniques used for water samples.

 The IR spectrum of a sample of cyclohexanol is recorded. Which major absorption bands you would be looking for in the spectrum?

Determine how many unpaired electrons are contained in the following octahedral complex ions: [Co(CN)₆]^3-, [CoF₆]^3- Estimate the magnetic moments of these complexes.

With the help of suitable diagrams explain how the IR spectrum is depicted in the absorption mode and the transmittance mode.

Six-coordinate d⁹ complexes of copper (+2) show pronounced tetragonal distortions. High-spin d⁴ (e.g., Cr²⁺ and Mn³⁺ and low-spin d⁷ six-coordinate complexes (e.g. Co²⁺ and Ni³⁺) may show a similar distortion, but complexes of these ions are less common, and the distortions are less pronounced than those in copper (+2). Why?

 Explain the Feiser and Scott rules for predicting π − π absorption in -unsaturated ketones (enones) and aldehydes.

. What sort of shift may be observed in bromobenzene, (C₆H₅Br)?

What would be the CFSE for an octahedral complex of a d⁶ ion in weak field and strong field?

Explain polymerization ligand isomerism with suitable example.

 Explain Woodward rules for predicting π − π absorption in dienes.

According to valence bond theory, how do you account for the indicated molecular geometry for the following compounds:

(i) [Co(NH₃)₆]³⁺ - Octahedral and (ii) [ZnCl₄]^2- - Tetrahedral

 What are the differences between Bathochromic shift and Hypsochromic shift?

Explain why Co(III)–NO₂ (nitro) complexes slowly convert into Co(III)–ONO (nitrito) complexes or vice versa.

. Give the resonance structures for the intermediate in the reaction where electrophile E⁺ attacks on 2-position of pyridine.