Q3/7O/11-14 Reg. No

St. Joseph’s College of Arts & Science (Autonomous) St. Joseph’s College Road, Cuddalore – 607001 CH305 - INORGANIC CHEMISTRY - II

Time : 3 hrs

Max Marks :75 SECTION – A (20X1=20) Answer ALL Questions

I. Choose the correct answer 1. Which one of them is monoatomic a) Oxygen b) Neon c) Fluorine

d) Nitrogen

2. The hybridisation of Si atom in silicates is c) sp3 a) sp b) sp2

d) dsp2

3. Among the following, which is used as abrasive? a) ZrC b) Be2C c) Al4C3 d) SiC 4. The more ionic hydride is b) PH3 a) NH3

c) SbH3

d) BiH3

5. The electronic configuration of d-block elements can be given by a) (n-1) d1-2 ns2 b) (n-1)d1-10ns2 c) (n-1)1-9ns1 d) (n-1)d1-10ns1 6. The shape of SO4-2 is a) Linear b) Trigonal

c) Tetrahedral

d) Pyramidal

7. In qualitative analysis, Al can be detected by using a) Alizarin b) Aluminon c) Both alizarin and aluminon d) Magneson 8. Rutile is the ore of a) Ti b) V

c) W

~1~

d) Cr

Q3/7O/11-14

9. The colour of Cr+3 is a) Purple b) Green

c) Violet

d) blue

10. There is no S-S bond in a) S2O42– b) S2O52–

c) S2O32–

d) S2O72–

II. Fill up the blanks: 11. Glass is soluble in -----------. 12. The ---------- halides of carbon is not hydrolysed by water. 13. Hydrazine is used as -------- fuel. 14. Ozone is used to --------- air. 15. Sulphide ore can be concentrated by ----------- separation method. III. Match the following: 16. Brown ring

- Oxidising agent

17. Yellow glass

-S

18. Bismuthates

- Magnetite

19. Allotropy

- Nitrate

20. Fe

- CdS SECTION - B (10X2= 20) Answer any TEN Questions

21. Differentiate Caro’s acid from Marshall's acid. 22. What do you mean by Keesom forces?

~2~

Q3/7O/11-14

23. Write any two exceptional properties of Fluorine. 24. Calculate the oxidation number of Sulphur in H2SO4. 25. Write short note on three dimensional silicates. 26. Write the preparation of hydroxylamine. 27. Mention any two uses of Noble gases. 28. How do you prepare Caro’s acid? 29. Vanadium forms more number of complexes than Tantalum. Why? 30. Why Is Water the Universal Solvent? 31. How is pure tungsten metal prepared? 32. Why transition metal ions show colors? SECTION-C (5X7= 35) Answer any FIVE Questions 33. With one example each explain the following. (2+2+3) a) Nesosilicates, b) Double chain silicates, e) Sheet silicates 34. a. What is the difference between aqueous and nonaqueous solvent.Give one example each. (4) . b. Give the uses of DMG & Cupferron. (1.5+1.5) 35. a. Which of the following will be more basic, hydrazine H2N−NH2 or ammonia NH3?Give reason b. Write note on chemistry of ozone. c. Draw the structure of H3PO4

~3~

(3) (3) (1)

Q3/7O/11-14

36. a. Compare H2O and HF. (3) b. How are peroxy acids of sulphur structurally different from thionic acids. (2) c. Mention any two anomalous properties of oxygen. (2) 37. a. Explain the extraction of Chromium from its ore. b. Compare the properties of Zr and Hf.

(5) (2)

38. a. Discuss the position of inert gases in the periodic table. b. Write a note on HF as a solvent.

(4) (3)

39. a. Write a short note on pseudo halogens. b. Explain the zone refining process.

(4) (3)

************

~4~