Q8/15D/04-15 Reg. No

St. Joseph’s College of Arts & Science (Autonomous) St. Joseph’s College Road, Cuddalore – 607001 PCH806S – INORGANIC CHEMISTRY - II Time : 3 hrs Max Marks :75 SECTION – A (20X1=20) Answer ALL Questions I. Choose the correct answer 1. Molar absorbtivities of compounds exhibiting charge transfer absorption are a) Small

b) Moderate

c) Large

d) negligible

2. Which of these statements about fission is incorrect? a. Fission reactions release a large amount of energy. b. Two lighter nuclei combine to form a heavier nuclei. c. Fission of uranium‐238 is initiated by the absorption of a neutron.

d. Fission of uranium‐238 nuclei was at the heart of the first atomic bomb 3. The correct electronic configuration and spin only magnetic moment of Gd3+ (at.no. 64) are (a) [Xe]4f7 and 7.9 BM

(b) [Xe]4f7 and 8.9 BM

(c) [Xe]4f6 5d1 and 7.9 BM

(d) [Rn]5f7 and 7.9 BM

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Q8/15D/04-15 4. The ground state term of [Ni(H2O)6] 2+is (a) 3 T1g

(b) 3 T2g

(c) 3A2g

(d) 4 T1g

5. Hemoglobin is an oxygen carrying protein. The correct statement about oxy-hemoglobin is that (a) the metal is low-spin in +3 oxidation state while dioxygen is in O2 ─ form (b) the metal is high-spin in +3 oxidation state while dioxygen is in O2 ─ form (c) the metal is low-spin in +3 oxidation state while dioxygen is in neutral form (d) the metal is high-spin in +3 oxidation state while dioxygen is in neutral form 6. Which statement about the lanthanide contraction is CORRECT? (a) It causes the 5f elements to have more oxidation states than the 4f elements. (b) It causes the atomic radius of Hf to be slightly smaller than that of Zr. (c) It causes La to be slightly larger than Y. (d) It causes La3+ to be more acidic than Lu3+. 7. 1 nanometre= _______ cm. a) 10(-9) b) 10(-8)

c) 10(-7)

d) 10(-6)

8. Which particle will be formed when an atom of 211Bi loses an alpha particle and the decay product then loses a beta particle? a) 210Au

b) 209Hg

c) 208TI

d) 207Pb

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Q8/15D/04-15 9. The half life period of a radioactive element is 140 days. After 560 days, one grame of the element will reduce to: a) 1/16g b) 1/8g c) 1/4g d) 1/2g 10. Which metal complex ion is expected to be subject to a Jahn-Teller distortion? a) [Cr(OH2)6]3+ b) [Cr(NH3)6]2+ c) [Cr(bpy)3]2+ d) [Cr(CN)6]3– II. Fill up the blanks 11. Orgel diagram show only _____ transitions. 12. The x-axis of a Tanabe-Sugano diagram is expressed in terms of ------ ----------. The y-axis is in terms of ---------------. 13.The common oxidation state of lanthanides is -------------. 14. When a parent or target isotope is bombarded causing the emission of radiation and the formation of a daughter isotope, the process is---15. Bubble chamber is used to ------------- the nuclear radiations. III. Match the following 16. Quantum dots 17. Quantum wire 18. quantum well 19. arm chair SWCNT 20. Chiral nanotube

-one dimension - θ>30˚ -θ=30˚ - Three dimension - narrow one dimension SECTION – B (10X2=20) Answer any TEN Questions

21. Tri positive lanthanides are pale in colour. Why?

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Q8/15D/04-15 22. Give any two limitations of crystal field theory. 23. The Racah Parameter B for [Ni(H2O)6]2+ is only about 70% of that for free Ni 2+ ion.Why 24. Give the nephalauxetic series. 25. How will you synthesis gold nano particles by chemical reduction method. 26. Explain the principle of AFM 27. Draw the Orgel diagram of d1 system 28. The observed bands of hexaaquacobalt (II) complex are at the frequencies 8100, 16000 and 19400 cm – 1 respectively. Calculate the Racah parameter B of the free metal ion. 29. What are hemocyanins?. 30. Explain the role of iron-sulphur proteins. 31. Compare positron emission and Orbital electron capture 32. What is meant by neutron activation analysis? SECTION - C (5X7=35) Answer any FIVE Questions 33. a) Considering the molecular orbital diagram of tetrahedron complex ,show that the intense yellow colour of CrO4

2-

cannot arise from

ligand field transition.What is the nature of the transition that give rise to strong colour of the chromate ion. b) Explain Lanthanide contraction and its consequences.

(4) (3)

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Q8/15D/04-15 34. a) Explain the electronic spectrum of a nickel(II) complex with the help of the Tanabe‐Sugano diagram.

(2+2)

b) Explain the Jahn‐Teller distortion in [Cu(H2O)6] 2+ 35. a) Determine the configuration (in the form t2gmeg

(3) n

or e

m

t2

n

, as

appropriate), the number of unpaired electrons, and the ligand field stabilization energy as a multiple of ∆o or ∆T for each of the following complexes using the spectrochemical series to decide, where relevant, which are likely to be strong‐field and which weak‐field. (a)[Co(NH3)6] 3+; (b) [Fe(OH2)6] 2+; (c) [Fe(CN)6] 3–; (d) [Cr(NH3)6] 3+;

(4)

b) [Cu(H2O)6] 2+ and [Cu(NH3)4] 2+ both appear blue in solution because of the presence of copper ions.

However, the two solutions are not

identical. How would the appearance of these solutions differ? If given an unlabeled sample of each, how could the two solutions be distinguished without collecting any spectra?

(3)

36. a) Graphically compare the O2 affinity of hemoglobin and myoglobin.(2) b) Explain O2 binding in hemerythrin.

(4)

c) What is the function of cytochrome-c?

(1)

37. a) Define (i)Nuclear isomerism (ii)Internal conversion . b) Explain the principle of fast breeder nuclear reactor.

(2+2) (3)

38. a) Explain any three technological advantages of Nano materials.(3) b) Explain the principle and advantages of SEM&TEM.

(4)

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Q8/15D/04-15 39. a) What is the role of Na+/K+ Pump in biological systems. (3) b) Write note on photonuclear and thermonuclear reactions

(2+2)

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