Ou 4th semester chemistry important questions

 Unit 1

SHORT QUESTIONS

 1. What is crystal field stabilization energy? Calculate CFSC for [Co(NH3)2]Cl3

2. Give the details of the application of co-ordination compounds in water softening.

3. Discuss about the toxicity of Hg and Pb metal ions.

4. Describe the procedure for the determination of composition of complex by Job method.

5. Calculate the CFSE for [Fe(CN)6] and [FeF6]3- complex ions. 

6. Discuss the biological significance of Mg and Ca elements. 

7. Write any three applications of coordination compounds.

8. Write the structure of haemoglobin.

LONG QUESTIONS 

1. What are the postulations of CFT?. Explain d-orbital splitting in tetrahedral

and square planar complexes. (v.imp) 

2. What are stepwise and overall stability constants? Derive the relationship

between them.

 3. Explain the crystal field splitting of octahedral complexes.

4. What is HSAB principle? Discuss its applications. 

5. Write the biological significance of Na+, K+,and Cl- ions.

6. Give the structure of chlorophyll and explain the co-ordination of magnesium in chlorophyll. 

7. Explain any four applications of the coordination compounds. 

8. Explain fixation of CO2 in Photo synthesis.

UNIT - II

 SHORT QUESTIONS

1. Give the evidence for 2-ketohexose structure, 

2. Discuss about the optical activity of naturally occurring amino acids.

3. Compare the basicity and aromaticity of pyridine.

4. Give the evidences for cyclic structure of glucose.

5. Write about malonic ester synthesis.

6. Discuss about the aromatic character of furan, thiophene and pyrrole

7. Explain the cyclic structure of glucose

8. What are essential and Non-essential amino acids?

7. Explain the cyclic structure of glucose

LONG QUESTIONS

1. Explain the evidences for straight chain pentahydroxyaldehyde of glucose

2. Describe the interconversions of (i) D-glucose to D-arabinose and (ii) Fructose to glucose.

3. What are osazones? Describe with examples

4. Write Osazone formation from glucose

5. Explain following conversions 

Aldohexose to Aldopentose 

ketohexose to aldohexose

6. Explain the following: 

 a. zwitter ion structure of amino acid

b. isoelectric point. 

c. primary structure of protein

7. Describe the Acidic Nature of Pyrrole.

8. Explain mechanism of

i. Strecker's synthesis

 ii. Chichibabin reaction (v.imp)

iii. dipeptide synthesis

iv. Dipeptide synthesis

UNIT -III

SHORT QUESTIONS

1. Derive the equation for first order rate constant. 

2. What is pseudo first order reaction? Give an example 

3. Differentiate thermal and photochemical reactions.

4.Define order of reaction and rate of reaction.

5. Write about saponification of ester.

6. Describe the consequences of light absorption.

7. Define molecularity with examples? 

8. Define phosphorescence and fluorescence.

LONG QUESTIONS

1. Explain the factors influencing the rate of reaction.

2. Derive the rate constant equation for first order reactions.

3. Explain the order of the reaction and half-life period in (i) Decomposition of H₂O₂ and (ii) Hydrolysis of methyl acetate. 

4. Describe the factors effecting rate of reactions. 

 5. What is order of reaction? Derive expression for first order rate constant and its half-life

6. Draw and explain various phenomena in Jablonski diagram.

7. Explain the following: 

I) Grothus Draper

II) Photochemical combination of H₂-Cl₂ reaction. 

8. Sketch neat diagram of Jabalanski and explain different types of electronic transitions. (v.imp)

Unit IV

SHORT QUESTIONS 

1. Discuss the limitations of valance bond theory,

2. Elaborate on synthetic applications of acetoacetic ester.

3. Write about optical and electrical stabilityof colloids.

 4. Write briefly about band theory.

5. Give the synthetic applications of malonic ester. 

6. Give the classification of colloids.

7. Write about Keto-Enol tautomerism? 

8. Explain lyophilic and lyophobic colloids.

LONG QUESTIONS

1. Explain about n-type and p-type; extrinsic and intrinsic semiconductors

2. Explain the metallic properties based on valence bond theory. Give its limitations.

3. Explain Mannich reaction and Michel addition. (v.imp)

4. Describe band theory of metal ions? Explain different types of

6. Write about Hardy Schultz law and discuss the significance of gold number.

7. Explain the following: Knoevengeal condensation

 8. Describe different types absorption. Explain Freundlich adsorption isotherm (v.v.imp)


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