ADIKAVI NANNAYA UNIVERSITY CHEMISTRY III SEMESTER MODEL QUESTION PAPER Paper – III : INORGANIC & ORGANIC CHEMISTRY 2017

ADIKAVI NANNAYA UNIVERSITY

RAJAMAHENDRAVARAM

CBCS / Semester System

(From 2015-16 Admitted Batch)

CHEMISTRY

III SEMESTER

MODEL QUESTION PAPER

Paper – III : INORGANIC & ORGANIC CHEMISTRY

Time: 3 hours                                                                          Maximum Marks: 75

PART- A

Answer any FIVE of the following questions

Each carries FIVE marks.                                                       . 5 x 5 = 25 Marks

1. Explain the oxidation states of d-block elements.

2. Write a note on EAN rule.

3. Discuss the free electron theory of bonding in metals.

4. Explain the reactivity of vinyl and allyl chlorides.

5. Write about the hydrogen bonding in hydroxy compounds.

6. How do we distinguish aldehydes from ketones?

7. Explain the acidic strengths of trimethyl acetic acid and trichloro acetic acid.

8. What is meant by active methylene group? Give two examples. 

PART- B

Answer ALL the questions.

Each carries TEN marks                                               . 5 x 10 = 50 Marks

9. (a) What are transition elements? Explain any two characteristic properties of

transition elements.

                                                  (OR)

(b) Explain the Band theory of metals.

10. (a) Explain the structures of [Ni(CO)4] and Fe(CO)5].

                                                    (OR)

(b) How are lanthanides separated by ion exchange and solvent extraction methods?

11. (a) i) Explain the stereochemistry of SN1 and SN2 reactions of alkyl halides.

ii) How do you prepare 1o, 2o and 3o alcohols from Grignard reagent?

                                                   (OR)

(b) Write the mechanism for the following:

i) Riemer-Tiemann reaction ii) Pinacol-Pinacolone rearrangement.

12. (a) Write the mechanism for the following:

i) Perkin reaction ii) Aldol condensation

                                                  (OR)

(b) How does acetaldehyde react with the following?

i) HCN ii) RMgX iii) NH2OH

13. (a) Write about any three preparation methods of carboxylic acids with examples.

                                                 (OR)

(b) State and explain Claisen condensation. How are the following prepared from

acetoacetic ester.

i) Propionic acid ii) Succinic acid