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BOARD OF INTERMEDIATE EDUCATION
SENIOR INTER CHEMISTRY
MODEL PAPER (English Version)
Time: 3 Hours Max. Marks: 60
SECTION - A
I. (i) Very Short Answer type questions.
(ii) Answer ALL questions.
(iii) Each question carries TWO marks. 10 ×× 2 = 20
1. What is an ideal solution?
2. What are pseudo first order reaction? Give one example.
3. Define the terms 'slag' and 'gangue'.
4. Iron becomes passive in conc. HNO3. Why?
5. HF is a liquid while HCl is a gas. Explain.
6. Aqueous Cu+2 ions are blue in colour. Where as aqueous Zn+2 ions are
colourless. Why?
7. What are 'Antibiotics'? Give 2 examples.
8. What are biodegradable and non biodegradable detergents? Give one example
for each.
9. What is decarboxylation?
10. What is Cannizzaro reaction?
SECTION - B
II. (i) Short Answer type questions.
(ii) Answer any SIX questions.
(iii) Each question carries FOUR marks. 6 ×× 4 = 24
11. Derive Bragg's equation.
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12. What is Van't Hoff factor? 0.6 ml of acetic acid having density 1.06 g/ml is
dissolved in 1 lit. of water. The depression of freezing point observed for this
solution is 0.0205 °C. Calculate the Van't Hoff factor.
13. How are colloids classified on the basis of interaction between dispersed phase
and dispersion medium.
14. Explain the purification of sulphide ore by froth flotation method.
15. Write the formulae of the following compounds.
a) Potassium Trioxalatoaluminate (III)
b) Penta amminechloro cobalt (III) chloride.
c) Diammine Chloronitrito - N - Platinum (II)
d) Potassium tetra cyanonickelate (II)
16. What are Hormones? Give one example for each.
(i) Steroid Harmones
(ii) Polypeptide harmones
(iii) Aminoacid derivatives
17. (a) What is Vulcanization of rubber?
(b) What are 'Thermosetting polymers'? Give two examples.
18. (a) What is "Kolbe's reaction"?
(b) What is Aspirin? How is it prepared?
SECTION - C
III. (i) Long Answer type questions.
(ii) Answer any TWO questions.
(iii) Each question carries EIGHT marks. 2 ×× 8 = 16
19. (a) State Faraday's first law of electrolysis?
A solution of CuSO4 is electrolysed for ten minutes with a current of 1.5
amperes. What is the mass of copper deposited at the cathode?
(b) Explain the terms
(i) Collision frequency (Z)
(ii) Probability factor (P)
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20. (a) Describe the manufacture of H2SO4 by Contact process briefly.
(b) Explain the reaction of the following with water
(i) XeF2 (ii) XeF4 (iii) XeF6
21. (a) How do you prepare ethylcyanide and ethylisocyanide from a common
alkyl halide?
(b) Explain the mechanism of the SN2 with one example.
Writer : A.N.S.Sankara Rao
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