Draw a flow chart for the classification of various types of chromatographic techniques.

Explain continuous extraction with the help of a suitable diagram. Which factors govern the efficiency of such extractions?

a) Draw the enantiomers for 2, 3-dibromopentane. Identify at least one pair of diastereomers  among these structures. Can it form meso form? State the reason for your answer. 

Briefly explain the extraction by chelation. Also give some examples of the chelating agents used.

Which reagents are used for extraction by solvation? Give suitable examples.

Explain the following terms: 

a) ModeratorExplain the following terms: 
 a) Moderator
 b) Breeder reactor
 c) Nuclear fusion
 d) Transmutation reaction
 e) Tracer technique 

What is significance of t-test? Explain using a suitable example.

Define Indeterminate errors. How we can reduce them

b) i) Based on Subsec. 6.6.3, draw a rough sketch of  curves for  and 

ii) Which of the two  and  has a nonzero value for orientation polarization? State the reason. 

Writ the procedure for the collection and preservation of water samples.

a) For  the lowest wave number absorption line in its rotational spectrum occurs at 41.11 

Calculate the wave numbers corresponding to its second, third and fourth  absorption lines. Explain the term, rotational spacing using these values.

b) What is the essential condition for a molecule to be microwave active? Classify the following molecules as microwave active or microwave inactive and state the reason in each case. 

[Hint: is a linear molecule and one of the nitrogen atoms is at the centre.]

a) You are provided with pure copper sulphate crystal. Using Beer-Lambert law, how can you determine the concentration of a test solution of copper sulphate? Explain in a detailed way 

Calculate the number of normal modes of vibration o  and  Draw diagrams to 

illustrate the symmetric stretching, asymmetric stretching and bending vibrations of

Using steps 1 to 5 given in Sec. 3.7 of Unit 3, draw the Lewis structures of  and  Using VSEPR theory, predict their shapes. 

b) Assume that the electron in  ion is in third orbit. Calculate  

i) the radius of the orbit, and 

ii) the total energy of the electron 

[Hint: ion also has atomic spectra similar to hydrogen atom. while applying relevant  equations, use Z = 3.] 

a) Calculate the ionisation energy of rubidium per atom, if light of wavelength  ) Calculate the ionisation energy of rubidium per atom, if light of wavelength 5.84  108 m produces electrons with a speed of  

[Hint: Assume that the threshold frequency refers to the frequency corresponding to the ionisation energy.]

Using Rodrigue’s formula, obtain expression for  and show that 

Using the following expression for a Bessel function of order m:

show that 

Expand the function  in a series of the form .