B.Sc. III Chemistry (Paper-B)

                                                               

Punjabi University Collage Ghudda

(Mid-Term Exam) Session- 2020

Subject : Chemistry (Paper B)                                                Class : B.sc III(NM)

Time : 1:30 Hrs                                                                         Max. Makrs 20

Note: The candidates are required to attempt any three question from Section A  carrying 5 marks each and attempt any 5 question from Section B  carrying 1 mark each.

SECTION – A

Q 1.(A)  What do you mean by Sinusoidal wave equation?

    (B) Describe the concept of particle in one dimensional box .

Q 2. What are quantum numbers? How do these Quantum numbers follow from the solution of Schrodinger wave equation?What are the postulates of Quantum mechanics based on the postulates of quantum mechanics? drive Schrodinger wave equation.

Q 3. (A) What do Laplacian and Hamiltonian operator stand for?

      ( B) Explain how classical mechanics fails when applied to phenomenon of black body radiation.

Q 4. (A) Why do transition elements in zero and lower oxidation state form complexes with weak ligands like CO, NO or PR3?

        (B) Calculate the Bohr magneton the expected magnetic moment for Ni3+ ion

Q 5. (A) Give a comparison of the oxidation state of the elements of the first transition series with those of the elements of second and third transition series. 

      ( B) Explain why first ionisation energy of Hg is higher than that of Cd?


                                  SECTION- B

Q 1. Explain the reasons that most of the transition metals are paramagnetic in nature?

Q 2. Discuss the chemistry of Cu(I) and Cu(ii) oxidation states.

Q 3. Write a brief note on the halides of the uranium.

Q 4. Actinides have greater tendency to form complex’s . Explain why?

Q 5. Zirconium and Hafnium exhibit similar properties. Why?

Q 6. Write expression for the energy of particle in one dimensional box. How can you justify the existence of zero point energy?

Q 7. Using the concept of quantum mechanics, describe the shape of s and p orbitals.

Q 8. Write a short note on Electromagnetic spectrum.


NOTE:- Complete your exam within 1:30Hr. Then create a PDF and send it to given E-mail before 12:00PM. It's mandatory to all.

E-mail: simardhaliwal80@gmail.com 


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